1772-6.5.1, Auxiliary Function PROM for the Mini-PLC
Contents
1. Operand Data Address g S 12 Bit Binary Number 200 Result Digit 1 MSD Diait 2 E Result Address E SID Aways 9 Always 0 Digit3 300 Digit 4 Digit 5 8D 301 E Enable Bit 1 Function in Progress S Sign Bit 12 Negative D Done Bit 1 Function Complete MSD Most Significant Digit LSD Least Significant Digit 11497 Bit No Operand Result 4 Enter the operand You can enter the operand from the keyboard of your industrial terminal or through ladder diagram functions If we choose to set bits 0 through 13 in word 200 that is insert the largest possible binary number in 12 bits we obtain 4095 for the corresponding BCD number Figure 3 36 The ones in bits 0 through 13 or word 200 indicate that each bit is set Figure 3 36 AF1 Binary to BCD Conversion Function Format After Execution 17 16 15 14 13 12 1110 7 6 5 4 3 2 1 O Data Address S 11 1 11 1 1 1 aya ap 1 200 Result Add ED 0 0 4 x 5 0 0 1 0 9 5 301 E Enable Bit 1 Function in Progress S Sign Bit 12 Negative D Done Bit 1 Function Complete 11498 3 37 Chapter 3 Programming 3 38 Entry and Display of Input and Result Values Figure 3 37 shows one method for inserting input values and displaying inputs and results of an AF1 binary to BCD conversion function Although there are other methods for accomplishing this2. 0 0 0 203 Operand 2 2 0 0 204 Result Address E S DER 0 0 0 305 0 0 1 0 0 0 2 306 Result 0 0 0 307 0 0 0 310 E Enable Bit 1 Function in Progress S Sign Bit 12 Negative D Done Bit 1 Function Complete ER Illegal Operand Divide by Zero 11492 Entry and Display of Input and Result Values Figure 3 17 shows one method you can use to enter values for operands 1 and 2 and for displaying the results of an AF1 division Although there are several techniques for accomplishing this we chose get instructions The first rung requests an AF1 division function The top branch of the second rung shows the two 6 digit operands while the lower branch shows the 12 digit quotient 3 21 Chapter 3 Programming 3 22 Figure 3 17 AF1 Division Function Input and Result Display Rungs Execute Aux Function Function Number 04 Data Addr 201 Result Addr 305 Storage 201 202 203 204 Bit e e H a 4 000 400 000 200 305 306 307 310 6 6 a I 6 j 000 002 080 000 Error Message If you divide by zero the error bit bit 14 is set and the result reads zero AF1 Square Root Function The AF1 square root function operates on a 3 digit BCD integer and presents the result in a 6 digit BCD number composed of three integer digits and 3 decimal digits The first integer digit and the last decimal digit digit 1 and digit
3. 12 Negative D Done Bit 1 Function Complete ER Error Bit 1 BCD Number 4095 Entered 11495 Entry and Display of Input and Result Values Figure 3 33 shows one method for inserting input values and displaying inputs and results of an AF1 BCD to binary conversion function Although there are other methods for accomplishing this we chose get instructions The first rung requests an AF1 BCD to binary conversion The top branch of the second rung shows the BCD number that is to be converted 004095 in words 200 and 201 The bottom branch shows in the hexadecimal notation FFF bits 0 through 13 in word 300 are set as shown in Figure 3 32 Figure 3 33 AF1 BCD to Binary Conversion Function Input and Display Rungs Execute Aux Function Function Number 13 Data Addr 200 Result Addr 300 Storage 200 201 Bit a k G 004 095 305 LG FFF 3 35 Chapter 3 Programming Error Message If you enter a BCD number larger than 4095 the error bit bit 14 is set and the result reads zero AF1 Binary to BCD Conversion Function The AF1 binary to BCD conversion function converts a 12 bit binary number to a BCD number from 0 to 4095 How to Enter an AF1 Binary to BCD Conversion Function To program an AF1 binary to BCD conversion function perform the following steps 1 Press SHIFT EAF or SHIFT SCT on the keyboard of your industrial terminal Figure 3 1 appears on the CRT 2 Enter 14 the function number for t
4. E Enable Bit 1 Function in Progress S Sign Bit 1 Negative D Done Bit 1 Function Complete MSD Most Significant Digit LSD Least Significant Digit 11488 3 Enter a data address and a result address If we enter a data address of 201 and a result address of 305 the AF1 establishes the data table format shown in Figure 3 11 The data address eventually contains the most significant three digits of operand 1 The AF1 reserves the next three higher addresses for the least significant three digits of operand 1 and the six digits of operand 2 The result address contains the most significant three digits of the result The AF1 reserves the next three higher addresses for the remaining nine digits of the result Chapter 3 Programming 4 Enter values for operands 1 and 2 You can enter these values from the keyboard of your industrial terminal or through ladder diagram functions Entry of operand 1 000400 and operand 2 000200 produces the result 000000080000 Figure 3 12 Figure 3 12 AF1 Multiplication Function Format After Execution BitNo 17 16 15 14 13 12 1110 7 6 5 4 3 2 1 0 P Data Address 0 0 0 201 0 Operand 1 4 0 0 202 S 203 0 0 0 0 Operand 2 2 0 0 204 EspD i 5 bi Address 0 0 1 0 0 0 306 Result 0 8 0 307 0 0 0 310 E Enable Bit 1 Function in Progress S Sign Bit 12 Negative D
5. Result Digit 4 Digit 5 306 E Enable Bit 1 Function in Progress S Sign Bit 1 Negative D Done Bit 1 Function Complete ER Error Bit 1 Overflow MSD Most Significant Digit LSD Least Significant Digit 11482 4 Enter values for operands 1 and 2 You can enter these values from the keyboard of your industrial terminal or through ladder diagram functions Entry of operand 1 102746 and operand 2 256384 produces the result 359130 when the addition function executes Figure 3 4 shows how the result is stored 3 8 Chapter 3 Programming Figure 3 4 AF1 Addition Function Format After Execution Bit No 17 16 15 14 13 12 11107 6 5 4 3 2 1 0 1 0 2 Operand 14 7 4 6 2 5 6 Operand 2 3 8 4 E S DJER 0 0 1 0 3 9 Result 1 3 0 E Enable Bit 1 Function in Progress S Sign Bit 1 Negative D Done Bit 1 Function Complete ER Error Bit 1 Overflow Entry and Display of Input and Result Values Data Address Word 201 Word 202 Word 203 Word 204 Result Address Word 305 Word 306 11483 Figure 3 5 shows one method for inserting input values and displaying input values and results of AF1 addition computations Although there are several techniques for accomplishing this we chose get instructions The first rung requests an AF1 addition The sec
6. 1 through 6 Digit 1 and 6 are most significant and least significant digits respectively Operand 2 and the 12 digits of the result are labeled similarly Chapter 3 Programming Figure 3 10 General AF1 Multiplication Function Word and Digit Format BitNo 17 16 15 14 13 12 1110 7 6 5 4 3 2 1 0 Digit 1 Data Address MSD Digit 2 Digit 3 m Operand 1 Digit 4 Digit 5 m1 Digit 1 A S MSD Digit 2 Digit 3 m 2 Operand 2 Digit 4 Digit 5 n m3 igi Result Address Digit 1 P M aiia MSD Digit 2 Digit 3 Digit 4 Digit 5 Digit 6 n Result Digit 7 Digit 8 Digit 9 n 2 Digit 10 Digit 11 Pige on E Enable Bit 1 Function in Progress S Sign Bit 12 Negative D Done Bit 1 Function Complete MSD Most Significant Digit LSD Least Significant Digit 11487 Chapter 3 Programming 3 16 Bit No Operand 1 Operand 2 Result Figure 3 11 AF1 Multiplication Function Format After Address Entry 17 16 15 14 13 12 1110 7 6 5 4 3 2 1 0 Diait 1 Data Address S MSD Digit 2 Digit 3 201 Digit 4 Digit 5 rt 202 Digit 1 n 3 MSD Digit 2 Digit 3 203 Digit 4 Digit 5 n 204 igi Result Address EE SD Digit 2 Digit 3 305 Digit 4 Digit 5 Digit 6 306 Digit 7 Digit 8 Digit 9 307 Digit 10 Digit 11 Digte 310
7. 11182 To install the AF1 perform the following steps Figure 2 2 1 Turn the mode select switch to PROG 2 Remove AC power from the I O chassis power supply 3 Remove the processor module from the I O chassis 4 Check all AF1 pins to ensure they are not bent or dirty 5 Loosen the screw and lift the PROM door 6 Push the ON tab in to unlock the socket 7 Position the AF1 as shown in Figure 2 2 Be sure the notch on your AF1 PROM faces the OFF tab 8 Line up the AF1 as shown in Figure 2 2 and seat in the socket Be sure the pins are aligned as they bend easily 9 Lock the AF1 in place by pushing the OFF tab in 10 Close the PROM door and tighten the screw 2 3 Chapter 2 Installation 24 Removal To remove the AF1 perform the following steps 1 2 Turn the mode select switch to PROG To maintain processor memory contents connect an external battery pack to the processor with the mini processor transport cable Figure 2 3 Remove AC power from the I O chassis power supply Remove the processor module from the I O chassis Loosen the screw lift up the PROM door and push the ON tab in to unlock the socket Figure 2 2 Carefully remove the AF1 and store it in its shipping container General Programming You access the AF1 by pressing SHIFT EAF execute auxiliary function or SHIFT SCT on the keyboard of your Industrial Terminal cat no 1770 T3 The instruction is an output
8. Done Bit 1 Function Complete 11489 Entry and Display of Input and Result Values Figure 3 13 shows one method you can use to enter values for operands 1 and 2 and for displaying the results of an AF1 multiplication Although there are several techniques for accomplishing this we chose get instructions The first rung requests an AF1 multiplication The top branch of the second rung shows the two 6 digit operands while the lower branch shows the 12 digit product Chapter 3 Programming Figure 3 13 AF2 Multiplication Function Input and Result Display Rungs Execute Aux Function Function Number 03 Data Addr 201 Result Addr 305 Storage 201 202 203 204 Bit c amp H 6 4 6 I 61 000 400 000 200 305 306 307 307 e H a a l aj 000 000 080 000 AF1 Division Function An AF1 division function operates on two 6 digit BCD numbers and presents the results in a 12 digit BCD number XXX XXX XXK XXX XXX XXX XXX XXX How to Enter an AF1 Division Function To program an AF1 division function perform the following steps 1 Press SHIFT EAF or SHIFT SCT on the keyboard of your industrial terminal Figure 3 1 appears on the CRT 2 Enter 04 the function number for AF1 division This entry identifies that the function entered is to perform an AF division and that the processor use the data table format shown in Figure 3 14 when executed Operands 1 and 2 represent two 6 di
9. Readings Being Averaged ere 3 Enter a data address and store in that address the number of values to average Then enter an address for the result Let s choose a data address of 200 and the number of values to average of 003 Also let s choose 305 as the address for the result Entering these values results in the data table format shown in Figure 3 23 Once you enter the data address the addresses of the remaining input words are selected automatically by the AFI Chapter 3 Programming Figure 3 23 AF1 Average Function Format After Address Entry Bit No Number of Inputs Input 1 Input 2 Input 3 Result 17 16 15 14 13 12 1110 7 6 5 4 3 2 1 0 Data Address 0 0 3 200 Digit 1 Digit 3 S Digit 1 Digit 2 Digit 3 202 S Digit 1 Digit 2 Digit 3 203 Digit 1 7 Result Address E S D ER MSD Digit 2 Digit 3 305 Digit 6 306 Digit 4 Digit 5 LSD E Enable Bit 1 Function in Progress S Sign Bit 1 Negative D Done Bit 1 Function Complete ER Error Bit Set if number of readings 0 MSD Most Significant Digit LSD Least Significant Digit 11586 Enter the values of the numbers you wish to average in the input word addresses You can enter these numbers from the keyboard of your industrial terminal or through ladder diagram functions if we choose to enter values of 413 235 and 121 into input word addresses 201 202 and 203 respect
10. instruction and may be preceded on a rung by input instructions Once you enter the function the block diagram of Figure 3 1 appears on the CRT To program a specific mathematics function you would enter the appropriate function number Table 3 A If you enter a non existent function number the following occurs When the processor attempts to execute a function number which does not exist on the AF1 the response of the processor depends upon whether the keyswitch is in the RUN or RUN PROGRAM position The response are In the RUN position the processor stops running and the CRT displays PROCESSOR FAULT and CHANGE PROCESSOR TO PROGRAM MODE The processor and memory LEDs illuminate After you change processor operation to program mode the LEDs turn off the CRT displays MODE SELECTION menu and PLC 2 RUN TIME ERROR PRESS 11 TO CONTINUE When you press 11 the CRT displays and intensifies the rung containing the illegal opcode and states ILLEGAL OPCODE INTENSIFIED INSTRUCTION LINKED WITH CAUSE OF ERROR In the RUN PROGRAM position the processor stops running and the CRT displays MODE SELECTION menu and PLC 2 RUN TIME ERROR PRESS 11 TO CONTINUE When you press 11 the CRT displays and intensifies the rung containing the illegal opcode and states ILLEGAL OPCODE INTENSIFIED INSTRUCTION LINKED WITH CAUSE OF ERROR 3 1 Chapter 3 Programming Table 3 A AF1 Function Numbers Function Mathematical Operation Number 01 Add 02 Subtract 0
11. number of values to be averaged the error bit bit 14 is set and the result reads zero AF1 Standard Deviation Function The AF1 standard deviation function determines the standard deviation of 3 digit BCD numbers giving a 6 digit result with an implied decimal point after the third digit The maximum number of values you can handle is 999 or is limited by the data table area available Standard deviation function uses the formula 1 Ee Es Nive LH XXX XXX l2 Where Xj one of a group of N numbers whose standard deviation is being calculated Xavg the arithmetic average of N numbers How to Enter an AF1 Standard Deviation Function To program an AF1 standard deviation function perform the following steps 1 Press SHIFT EAF or SHIFT SCT on the keyboard of your industrial terminal Figure 3 1 appears on the CRT 2 Enter 07 the function number for AF1 standard deviation This entry identifies that the function entered is to perform an AF1 standard deviation and that the processor use the data table format shown in Figure 3 26 when executed The three digits showing the number of inputs and the three digits of each input value are represented in BCD by groups of bits labeled digit 1 through 3 The six digits of the result are labeled digit 1 through 6 3 29 Chapter 3 Programming Figure 3 26 General AF1 Standard Deviation Function Word and Digit Format BitNo 17 16 15 14 13 12 1110 7 6 5 4 3 2 1
12. or SHIFT SCT on the keyboard of your industrial terminal Figure 3 1 appears on the CRT 2 Enter 13 the function number for AF1 BCD to binary conversion This entry identifies that the function entered is to perform an AF1 BCD to binary conversion and that the processor use the data table format shown in Figure 3 30 when executed 3 33 Chapter 3 Programming Bit No Operand Result Bit No Operand Result Figure 3 30 General AF1 BCD to Binary Conversion Function Word and Digit Format 17 16 15 14 13 12 1110 7 6 5 4 3 2 1 0 Digit 1 MSD Digit 2 Digit 3 S Always 0 Always 0 Must Be 3 4 2a ae Digit 6 Digit 4 Digit 5 L D E S D ER E Enable Bit 1 Function in Progress S Sign Bit 12 Negative D Done Bit 1 Function Complete ER Error Bit 1 BCD Number 4095 Entered MSD Most Significant Digit LSD Least Significant Digit 3 Enter a data address Data Address m Result Address n 11493 If we choose a data address of 200 and a result address of 300 the data table format is as shown in Figure 3 31 The most significant three digits of the operand the BCD number we want to convert to binary reside in the data address word 200 and the least significant three digits reside in the next higher address 201 The first two digits are always zero and the third digit must not excee
13. or later Programming the AF1 functions with either series Mini PLC 2 15 processor module requires the Industrial Terminal cat no 1770 T3 The AF1 has a 2K 16 bit word section to which you can transfer your program for backup memory and a 2K word section for higher mathematical functions you can only transfer your program into the AF1 with the series B PLC 2 15 controller Table 1 A Series A Mini PLC 2 15 Processor EPROM publication 1770 915 describes program transfer to PROM With the series A PLC 2 15 controller program transfer to the AF1 is not possible Table 1 A AF1 Response to Controller Mini PLC 2 15 Controller Series User Program 2K Words Erase 1 lYou can erase the 2K memory backup portion of the AF1 with ultraviolet light However the 2K section for higher mathematical functions would also be erased and all AF1 function capabilities lost Once erased the AF1 functions are irretrievable NOTE The AFI is sensitive to ultraviolet light therefor when exposed to uv light both the program and the auxiliary functions are erased The AF1 s transparent window is covered with the product label to avoid accidental alternation of memory from uv light sources Do not remove this label Chapter 1 Introduction Functions Manual s Purpose Audience The AF1 performs the following arithmetic functions 6 digit add and subtract 6 digit multiply and divide Square rote
14. transparent window is covered with the product label to avoid accidental alteration of memory from uv light sources Do not remove this label Store the AFI in its shipping container when not installed in a Mini PLC 2 15 processor The AF1 can be damaged during routine handling if proper precautions are not taken to reduce static electricity discharges Recommended precautions include Handle the AF1 by the case without touching its pins Use a static free work station Wear a conductive wrist strap which has a minimum 200k ohms resistance and is connected to earth ground Ground tools prior to contacting the AF1 Connect static free work station to ground through a minimum 200k ohm resistance Control the relative humidity of the installation area ideal conditions are 40 to 60 relative humidity The following is a list of things that should not be done Do not handle styrofoam plastic or cellophane covered articles such as combs cigarette packages and candy immediately prior to handling an AF1 Do not hand the AF1 to someone who is not antistatic protected Do not install the AF1 in areas which might contaminate or foul the pins of the AF1 device Do not handle the AF1 by its pins Do not slide the AF1 across any surface Do not place the AF1 in a non conductive plastic bag When these precautions are followed the potential difference between the AF1 pins is reduced thereby reducing the problem
15. we chose get instructions The first rung requests an AF1 binary to BCD conversion function The top branch of the second rung shows the binary number in the hexadecimal notation FFF that we want converted to BCD In this example the binary number is the largest possible with bits 0 through 13 or word 200 set as shown in figure 3 36 The lower branch shows the resulting BCD number 004095 in words 300 and 301 Figure 3 37 AF1 Binary to BCD Conversion Function Input and Result Display Rungs Execute Aux Function Function Number 14 Data Addr 200 Result Addr 300 Storage 200 Bit LG FFF 300 301 G G 004 095 Sign Bits If you encounter any binary data where the sign bit is not in bit 16 you must move the sign bit into bit 16 of an auxiliary data table word prior to doing a binary to BCD conversion If for example the sign bit of your module is bit 15 in word 200 the rungs in Figure 3 38 permit you to make a binary to BCD conversion The first rung puts word 200 data into word 201 Rung two sets bit 16 in word 201 if bit 15 in word 200 is set The AF1 binary to BCD conversion function in rung three then uses word 201 as its data address Figure 3 38 Transfer of Sign Bit Chapter 3 Programming 201 Execute Aux Function Data Addr Result Addr Function Number 14 201 put 3 39 Symbols Empty 3 25 A Accuracy 3 6 Addition 3 6
16. 0 Number of Inputs Digit 1 Pens Diait 3 we MSD ig LSD Input 1 S Digit 1 Digit 2 Digit 3 T Input 2 S Digit 1 Digit 2 Digit 3 m 2 Input 3 S Digit 1 Digit 2 Digit 3 m 3 Input N S Digit 1 Digit 2 Digit 3 TEN m Result Address E S DER Mio Digit 2 Digit 3 n Result iai inj Digit 6 n 1 Digit 4 Digit 5 LSD E Enable Bit 1 Function in Progress S Sign Bit 1 Negative D Done Bit 1 Function Complete ER Error Bit Set if number of readings 0 MSD Most Significant Digit LSD Least Significant Digit N Number of Readings Whose Standard Deviation is Sought 11588 3 Enter a data address and store in that address the number of values whose standard deviation you wish to determine Let s choose a data address of 200 and the number of values whose standard deviation we want of 003 Also let s choose 305 as our result address Entering these values results in the data table format shown in Figure 3 27 once you enter the data address the addresses of the remaining input words are selected automatically by the AF1 3 30 Bit No Number of Inputs Input 1 Input 2 Input 3 Result Chapter 3 Programming Data Address 200 201 202 203 Result Address 305 306 Figure 3 27 General AF1 Deviation Function Format After Address Entry 17 16 15 14 13121110 7 6 5 4
17. 3 Multiply 04 Divide 05 Square root 06 Average 07 Standard deviation 13 BCD to binary conversion 14 Binary to BCD conversion You enter an existent function number and then enter data and result addresses we will explain this in detail later The processor then places a number in the data address AF1 Function Sequence When the Mini PLC 2 15 controller encounters an AF2 function during program execution and the rung is true the processor performs the following steps 1 Saves its present position in the user program 2 The interlock system see Avoiding Excessive AF1 Execution Times grants access to the AF1 function 3 Reads the operand s data stored in the data address that you entered 4 Reads the result address which you entered 5 Obtains the location of the mathematical routine requested by the function number 6 Executes the routine in the AF1 area See section for excessive execution time 7 Writes the results at the result address in the data table 8 Returns program execution to the next instruction in the user s program after the AF1 function is completed See section for excessive execution time 9 Readies itself for the next AF1 operation 3 2 AF1 Automatic Checks Chapter 3 Programming To guard against improper program execution automatic check routines are incorporated in the AF1 The processor uses these routines to prevent the following Executing AF1 functions having inval
18. 3 21 Q0 0 0 3 Digit 1 me Digit 3 S MSD Digit 2 L D S Digit 1 Digit 2 Digit 3 S Digit 1 Digit 2 Digit 3 Digit 1 T E S D ER MSD Digit 2 Digit 3 Digit 6 Digit 4 Digit 5 LSD E Enable Bit 1 Function in Progress S Sign Bit 1 Negative D Done Bit 1 Function Complete ER Error Bit Set if number of readings 0 MSD Most Significant Digit LSD Least Significant Digit 11586 4 Enter the values of the numbers whose standard deviation is desired in the input word addresses You can enter these numbers from the keyboard of your industrial terminal or through ladder diagram functions If we choose to enter values of 200 201 and 202 into input word addresses 201 202 and 203 respectively we obtain the result shown in Figure 3 28 when the standard deviation function executes The result appears in words 305 and 306 as 000 816 The result is truncated but is accurate to 0 001 3 31 Chapter 3 Programming Bit No Number of Inputs Input 1 Input 2 Input 3 Result 3 32 Figure 3 28 AF1 Standard Deviation Function Format After Execution 17 16 15 14 13 12 1110 7 6 5 4 3 2 1 0 Word 0 0 3 200 Data Address 2 0 0 201 2 0 1 202 2 0 2 203 ES DER i j d Address 0 0 1 0 8 1 6 300 E Enable Bit 1 Function in Progress S Sign Bit 1 Negative D Done Bit 1 Function Com
19. 3 B lists execution times for AF1 functions To avoid excessive AF1 function execution times an interlock system is designed into the AF1 This system automatically checks and does the following Permits no AF1 function to run longer than 6ms without returning processor scan to the processor During a program scan each true AF1 function rung which can be completed in a single scan will be completed as it is encountered However upon encountering a true AF1 function rung which requires multiple program scan 3 3 Chapter 3 Programming 3 4 to complete all other true AF1 function rungs will be locked out until sufficient program scans complete the active AF1 function rung Once started it completes an AF1 function prior to starting the next AF1 function encountered in the user program which has a true rung condition Limits the number of enabled AF1 functions in a program to 50 You may include more functions but you must ensure that no more than 50 are enabled at one time This requirement only applies where you have programmed a function that requires more than one scan to complete Table 3 B Execution Time 1 Function Avg Time Worst Time Number or Scans Addition 1 22ms 1 27ms 1 Subtraction 1 22ms 1 27ms 1 Multiplication 4 99ms 5 28ms 1 Division 16 17ms 21 76ms 4 Square Root 6 08ms 7 11ms 1 Average 12 33ms 4 N 4 Pl 0 29ms per value Standard Deviation 94 16ms 22 5N 4 l2 2 09ms per valu
20. 6 are always zero 4XXX 2 4 XXX XXX A decimal point is implied between digits 3 and 4 the function calculates the square root of the absolute input value and sets the sign bit in the output to the sign of the input The result is accurate to 01 How to Enter an AF1 Square Root Function To program an AF1 square root function perform the following steps 1 Press SHIFT EAF or SHIFT SCT on the keyboard of your industrial terminal Figure 3 1 appears on the CRT 2 Enter 05 the function number for AF1 square root This entry identifies that the function entered is to perform an AF1 square root and that the processor use the data table format shown in Figure 3 18 when executed The three digits of the operand the number whose square root you desire are represented in BCD by the groups of bits labeled digit 1 through 3 The six digits of the result are labeled digit 1 through 6 Digit 1 and digit 6 in the result are always zero Bit No Operand Result Figure 3 18 General AF1 Square Root Function Word and Digit Format 17 16 15 14 13 12 1110 7 6 5 4 3 2 1 0 Digit 1 au Digit 3 3 MSD Digit LS Digit MSD m T EISID Always 0 Digit 2 Digit 3 ai iai Digite LSD Digit 4 Digit 5 Always 0 3 Chapter 3 Programming E Enable Bit 1 Function in S Sign Bit 1 Negative Progress D Done Bit 1 Function Complete MSD Most Significant
21. Address Data 3 2 3 7 Invalid 3 3 Result 3 2 3 7 Valid 3 3 AF1 PROM 1 1 Applications 1 2 Automatic checks _3 3 Average function 3 25 BCD to binary 3 33 Binary to BCD 3 36 Bits 3 5 Done 3 5 Enable 3 5 Error 3 5 Unused 3 6 bits Sign 3 5 C Checks 3 3 Result addresses 3 3 Scan Time 3 5 Contamination 2 1 D Data Address 3 7 Data table valid areas 3 3 Data table format 3 5 Digit location 3 5 Division 3 18 Done bit 3 6 3 7 o Index E Enable Bit 3 5 Error bit 3 6 Error messages 3 5 Execution time 3 3 F Function numbers 3 1 3 2 Function sequence 3 2 Functions 1 2 H Handling Precautions 2 1 Humidity 2 1 Illegal address 3 3 Illegal opcode 3 1 Installation 2 1 Interlock system 3 3 Invallid address 3 3 Memory backup 2 3 Multiplication _3 14 P Programming 3 1 PROM 1 1 R Result 3 2 Result address 3 34 Index S Sign bit 3 5 3 38 Square root 3 22 Standard deviation function 3 29 Static electricity 2 1 T Time execution 3 3 U Ultraviolet Light 1 1 Unuse bits 3 6 W Word arrangement 3 5 ALLEN BRADLEY Allen Bradley has been helping its customers improve productivity and quality for 90 years A ROCKWELL INTERNATIONAL COMPANY A B designs manufactures and supports a broad range of control and automation products worldwide They include logic process
22. Auxiliary Function PROM Cat No 1772 AF1 for the Mini PLC 2 15 Controller User Manual Table of Contents Introduction slseeeee rn nn n n n n 1 1 General 2 412 BESS be odds he wees oe Se babe ee 1 1 F nctons e iuezrzecu eibeeo 2R PINGERE CN rE 1 2 Manual s Purpose 2 0 0 cece ence eee IB 1 2 AUGIenGe x abuser eden qeu Gad RE Nobu dede ha ends 2 1 2 Installation 0 eee nnn n m n nm 2 1 Genel al urls cr Rura PNEU REIS a eet eee etn ence ee 2 1 Installation Removal Handling Precautions 2 1 Installation 2 2 eee eens 2 2 Removal 2 ass ovees Soee bee ete s Cee ee Poe wee es SE ING 33 24 Programming susurro ee hh nh hh nmn 3 1 General tc coo ien See a vere ee ence ee E 3 1 AF1 Function Sequence lsllusllseslsseeeese 3 2 AF1 Automatic Checks 00ce cece eee eeeee 3 3 C ion Programming Specific Mathematical Functions General Introduction Installation of the Auxiliary Function AF PROM cat no 1772 AF1 in your Mini PLC 2 15 controller lets you expand its mathematical capabilities For simplification throughout this manual we refer to the Auxiliary Function PROM cat no 1772 AF1 as the AF1 The AF1 can only be used with the series A Mini PLC 2 15 processor module firmware revision 11 or later cat no 1772 LV The AF4 can only be used with the series B Mini PLC 2 15 processor module firmware revision 4
23. Average Standard deviation BCD to binary conversion Binary to BCD conversion Applications These arithmetic functions have applications in various industries such as food processing machine tool work and material handling Applications in these industries could be weighing blending batch processing scaling positioning test stands and heat treating The square root function is frequently used for flow measurement and mining applications The average function can be used for averaging thermocouple inputs or other process variables Standard deviation and averaging have applications in trend analysis and report generation This manual shows you how to install and program the AF1 in your Mini PLC 2 15 controller We assume that you are familiar with programming and operation of the Mini PLC 2 15 and the Industrial Terminal cat no 1770 T3 If this is not the case refer to the appropriate publications or see our Publications Index publication SD499 WARNING Use only Allen Bradley authorized programming devices to program Allen Bradley programmable controllers using unauthorized programming devices may result in unex pected operation possibly causing equipment damage and or injury to personnel General Installation Removal Handling Precautions Installation During AF1 installation take special care not to bend or contaminate the pins Bent or dirty pins can prevent proper AF1 programming and use The AFI s
24. Digit LSD Least Significant Digit Enter a data address and a result address Data Address m Result Address n n 1 11582 If we enter a data address of 200 and a result address of 305 the AF1 establishes the data table format shown in Figure 3 19 The data address eventually contains the three digits of the number whose square root is sought The result address word 305 contains the first three digits integer part of the result The three decimal digits of the result are stored in the next higher address word 306 The implied decimal point is between digits 3 and 4 Figure 3 19 AF1 Square Root Function Format After Address Entry Bit No 17 16 15 14 13 12 1110 7 6 5 4 3 2 1 0 Digit 1 ur Digit 3 Operand S MSD Digit 2 b Digit 1 Digit 2 Digit 3 EISD lways 0 MSD Result iei iei Digit 6 LSD Digit 4 Digit 5 Always 0 E Enable Bit 1 Function in Progress S Sign Bit 1 Negative D Done Bit 1 Function Complete MSD Most Significant Digit LSD Least Significant Digit Data Address 200 Result Address 305 306 11583 3 23 Chapter 3 Programming 4 Enter the value for the operand You can enter the value from the keyboard of your industrial terminal or through ladder diagram functions Entry of operand 144 produces the result 12 when the square root function executes Figure 3 20 shows how the result is stored The result is
25. able area available How to Enter an AF1 Average Function To program an AF1 average function perform the following steps 1 Press SHIFT EAF or SHIFT SCT on the keyboard of your industrial terminal Figure 3 1 appears on the CRT 2 Enter 06 the function number for the AF1 average function This entry identifies that the function entered is to perform an AF1 average and that the processor use the data table format shown in Figure 3 22 when executed The three digits showing the number of inputs and the three digits of each input value are represented in BCD by groups of bits labeled digit 1 through 3 The 6 digits of the results are labeled digit 1 through 6 3 25 Chapter 3 Programming 3 26 Figure 3 22 General AF1 Average Function Word and Digit Format BitNo 17 16 15 14 13 12 1110 7 6 5 4 3 2 1 0 Number of Inputs Digit 1 ns Digit 3 cia MSD Ig LSD Digit 1 Digit 3 Input 1 S MSD Digit 2 LSD m 1 Input 2 S Digit 1 Digit 2 Digit 3 m 2 Input 3 S Digit 1 Digit 2 Digit 3 m 3 Digit 1 a Digit 3 m N Input N S MSD Digit 2 L D Result Address E S DER RE Digit 2 Digit 3 n Result Digit 4 Digit 5 n by n 1 E Enable Bit 1 Function in Progress S Sign Bit 1 Negative D Done Bit 1 Function Complete ER Error Bit Set if number of readings 0 MSD Most Significant Digit LSD Least Significant Digit N Number of
26. accurate to 0 01 Figure 3 20 AF1 Square Root Function Format After Execution BitNo 17 16 15 14 13 12 1110 7 6 5 4 3 2 1 0 Data Address Operand 1 4 4 200 Els D i i A iind Address 0 0 1 Result 0 0 0 306 E Enable Bit 1 Function in Progress S Sign Bit 12 Negative D Done Bit 1 Function Complete 11584 Entry and Display of Input and Result Values Figure 3 21 shows one method for inserting the input value and displaying the input value and result of an AF1 square root Although there are several techniques for accomplishing this we chose get instructions The first rung requests an AF1 square root function The second rung shows the operand 144 in word 200 and the resultant square root 012 000 in words 305 and 306 Figure 3 21 AF1 Square Root Function Input and Result Display Rungs Execute Aux Function Function Number 05 Data Addr 201 Result Addr 305 Storage 200 Bit G b ur 144 305 306 Lea 8 012 000 Chapter 3 Programming AF1 Average Function The AF1 average function determines the average of a group of N three digit integers The numbers are in BCD format XXX F XXXX2 F Xa4X29X3 X NX NX NXN SSS OY N The result is a 6 digit number composed of a 3 digit integer and a 3 digit decimal fraction The maximum number of values you can average is 999 or is limited by the data t
27. d four The number converted to binary format is stored in bits 0 through 13 in the result address word 300 Figure 3 31 AF1 BCD to Binary Conversion Function Format After Address Entry 17 16 15 14 13 12 1110 7 6 5 4 3 2 1 0 S Digit 1 MSD Always 0 Digit 2 Always 0 Digit 3 Must Do 34 Digit 4 Digit 5 Digit 6 LSD E S D ER E Enable Bit 1 Function in Progress S Sign Bit 12 Negative D Done Bit 1 Function Complete ER Error Bit 1 BCD Number gt 4095 Entered MSD Most Significant Digit LSD Least Significant Digit Data Address 200 201 Result Address 300 11494 Chapter 3 Programming 4 Enter the operand You can enter the operand from the keyboard of your industrial terminal or through ladder diagram functions If we choose to enter 4095 the largest BCD number that we can convert to a 12 bit binary number we obtain the data tale configuration shown in Figure 3 32 Figure 3 32 AF1 BCD to Binary Conversion Function Format After Execution Bit No 17 16 15 14 13 12 11 10 7 6 5 4 3 2 1 0 Operand S mus Address 4 0 0 0 0 9 5 201 Result Result Address amp Qmgttttttttt itt t 300 E Enable Bit 1 Function in Progress S Sign Bit
28. e BCD to Binary 0 89ms 1 Binary to BCD 0 84ms 1 1 These times are calculated for a single AF1 function Overhead for AF1 lock maintenance and multiple rungs through the ladder program to complete some function are included 2 N number of values whose average or standard deviation is sought The time listed in Table 3 B includes Overhead for AF1 PROM interlock system One run through the portion of the AF1 specified by the particular function Programming Specific Mathematical Functions Chapter 3 Programming To obtain the time required from activation of the input that makes the rung containing the AF1 PROM function true until the correct answer for the function is in the data table you must add the following times to the values in Table 3 B Input delay time from specification for specific input One program scan time and one I O scan time multiplied by the number of scans specified in Table 3 B Methods for determining these times are presented in Mini PLC 2 15 series B Programmable Controller Programming and Operations Manual publication 1772 804 In this section we explain the following for each of the AF1 functions a What it is How to enter it in your program ts format in the data table a word arrangement b digit location Sample entry and display rungs Although there are several techniques to enter this data we use get instructions Error messages If an AF1 function has sp
29. ecial error message responses to specific illegal programming procedures we state these responses Status Bits The most significant four bits of the most significant word of the result data area are reserved for status bits These bits have the following meanings Enable bit 17 Sign bit 16 Done bit 15 Error bit bit 14 The enable bit is set at the start of an AF1 function and reset upon completion The sign bit if set indicates a negative value 3 5 Chapter 3 Programming The done bit is rest at the start of an AF1 function and set upon completion The error bit is a general error flag that indicates overflow and invalid operand or result errors Individual functions determine the actual state of this bit Throughout this manual unused status bits are shown blank for the following reasons Whether the content of an unused status bit in an input word is 0 or 1 is irrelevant as such bits are ignored in AF1 function execution The AF1 reset unused status bits in result words For simplicity these bits are left blank Accuracy The accuracy of all function results on the Af1 is typically 1 in the least significant digit AF1 Addition Function An AF1 addition function operates on two 6 digit BCD numbers and presents the result in a third 6 digit BCD number XXX XXX 4 XXX XXX XXX XXX How to Enter an AF1 Addition Function To program an AF1 addition function perform the following steps 1 P
30. git 1 Result Address E S D ER MSD Digit 2 Digit 3 305 Digit 4 Digit 5 Digit 6 306 Result Digit 7 Digit 8 Digit 9 307 Digit 10 Digit 11 en 310 E Enable Bit 1 Function in Progress S Sign Bit 1 Negative D Done Bit 1 Function Complete ER Illegal Operand Divide by Zero MSD Most Significant Digit LSD Least Significant Digit 11491 3 Enter a data address and a result address If we enter a data address of 201 and a result address of 305 the AF1 establishes the data table format shown in Figure 3 15 The data address eventually contains the most significant three digits of operand 1 The AF1 reserves the next three higher addresses for the least significant three digits of operand 1 and the six digits of operand 2 The result address contains the most significant three digits of the result The AF1 reserves the next three higher addresses for the remaining nine digits of the result 3 20 Chapter 3 Programming 4 Enter values for operands 1 and 2 You can enter these numbers from the keyboard of your industrial terminal or through ladder diagram functions Entry of operand 1 000400 and operand 2 000200 produces the result 000002 000000 Figure 3 16 Figure 3 16 AF1 Division Function Format After Execution BitNo 17 16 15 14 13 12 1110 7 6 5 4 3 2 1 0 Data Address 0 0 0 201 Operand 1 4 0 0 202
31. git numbers whose quotient you wish to find The six digits of operand 1 are represented in BCD by groups of bits labeled digit 1 through 6 Digit 1 and 6 are the most significant and least significant digits respectively Operand 2 and the 12 digits of the result are labeled similarly 3 18 Chapter 3 Programming Figure 3 14 General AF1 Division Function Word and Digit Format BitNo 17 16 15 14 13 12 1110 7 6 5 4 3 2 1 0 Didit 1 Data Address S MSD Digit 2 Digit 3 m Operand 1 Digit 4 Digit 5 L8 m1 Digit 1 i p S MSD Digit 2 Digit 3 m 2 Operand 2 Digit 4 Digit 5 n D m 3 X Result Address Digit 1 s E E S D JER MSD Digit 2 Digit 3 n Digit 4 Digit 5 Digit 6 n 1 Result Digit 7 Digit 8 Digit 9 n 2 Digit 10 Digit 11 en n 3 E Enable Bit 1 Function in Progress S Sign Bit 1 Negative D Done Bit 1 Function Complete ER Illegal Operand Divide by Zero MSD Most Significant Digit LSD Least Significant Digit 11490 3 19 Chapter 3 Programming Figure 3 15 AF1 Division Function Format After Address Entry BitNo 17 16 15 14 13 12 1110 7 6 5 4 3 2 1 0 Digit 1 Data Address S MSD Digit 2 Digit 3 201 Operand 1 Digit 4 Digit 5 n by 202 Digit 1 S MSD Digit 2 Digit 3 203 Operand 2 Digit 4 Digit 5 n by 204 Di
32. he AF1 binary to BCD conversion function This entry identifies that the function entered is to perform an AF1 binary to BCD conversion and that the processor use the data table format shown in Figure 3 34 when executed Figure 3 34 General AF1 Binary to BCD Conversion Function Word and Digit Format Bit No 17 16 15 14 13 12 1110 7 6 5 4 3 2 1 0 Operand Data Address S 12 Bit Binary Number m Result ij ini Result Address Digit 1 MSD Digit 2 m ESID Always 0 Always 0 Digit 3 n Digit 4 Digit 5 by n1 E Enable Bit 1 Function in Progress S Sign Bit 1 Negative D Done Bit 1 Function Complete MSD Most Significant Digit LSD Least Significant Digit TM 3 36 Chapter 3 Programming 3 Enter a data address and a result address If we choose a data address of 200 and a result address of 300 the data table format is as shown in Figure 3 35 Bits 0 through 13 of word 200 are reserved for the operand the 12 bit binary number we want to convert to BCD The result address 300 contains the most significant three digits of the resulting BCD number The least significant three digits reside in the next higher address 301 The first two digits of the BCD number are always zero and the third digit can not exceed four Figure 3 35 AF1 Binary to BCD Conversion Function Format After Address Entry BitNo 17 16 1514 131211 10 7 6 5 4 3 2 1 0
33. here are several techniques for accomplishing this we chose get instructions The first rung requests an AF1 subtraction The second rung shows the two operands in its top branch and the resultant difference in its lower branch 3 13 Chapter 3 Programming Figure 3 9 AF1 Subtraction Function Input and Result Display Rungs Execute Aux Function Function Number 01 Data Addr 201 Result Addr 305 201 202 203 204 SNMP a 4 a m 68 6 o 102 746 256 384 305 306 H e H 86 153 638 Error Message If the result has more than six integers the error bit bit 14 is set indicating overflow AF1 Multiplication Function An AF1 multiplication function operates on two 6 digit BCD numbers and presents the results in a 12 digit BCD number XXX XXX X XXX XXX XXX XXX XXX XXX How to Enter an AF1 Multiplication Function To program an AF1 multiplication function perform the following steps 1 Press SHIFT EAF or SHIFT SCT on the keyboard of your industrial terminal Figure 3 1 appears on the CRT 2 Enter 03 the function number for AF1 multiplication This entry identifies that the function entered is to perform an AF1 multiplication and that the processor use the data table format shown in Figure 3 10 when executed Operands 1 and 2 represent two 6 digit numbers whose product you want to find The six digits of operand 1 are represented in BCD by groups of bits labeled digit
34. id function addresses Spending so much time executing AF1 functions that the controller neglects its main program and I O scans Invalid Function Addresses Valid AF1 function addresses include the I O image table and the data table except word 027 Specifically valid addresses are from 010 to 026 from 030 to 077 and from 110 to the end of the data table Result addresses must not reside in the input image table When a user programmed function has an invalid address the response of the processor depends upon whether the keyswitch is in the RUN or RUN PROGRAM position The responses are In the RUN position the processor stops running and the CRT displays PROCESSOR FAULT and CHANGE PROCESSOR TO PROGRAM MODE The processor and memory LEDs illuminate After you change processor operation to program mode the LEDs turn off and the CRT displays MODE SELECTION menu and PLC 2 RUN TIME ERROR PRESS 11 TO CONTINUE When you press 11 the CRT displays and intensifies the rung containing the illegal address and states ILLEGAL ADDRESS INTENSIFIED INSTRUCTION LINKED WITH CAUSE OF ERROR In the RUN PROGRAM position the processor stops running and the CRT displays MODE SELECTION menu and PLC 2 RUN TIME ERROR PRESS 11 TO CONTINUE When you press 11 the CRT displays and intensifies the rung containing the illegal address and states ILLEGAL ADDRESS INTENSIFIED INSTRUCTION LINKED WITH CAUSE OF ERROR Avoiding Excessive AF1 Execution Times Table
35. it 5 hese m 3 El s D er Digit 1 m Result Address MSD igit 2 igit 3 n Result Digit 6 Digit 4 Digit 5 i5 n 1 E Enable Bit 1 Function in Progress S Sign Bit 1 Negative D Done Bit 1 Function Complete ER Error Bit 1 Overflow MSD Most Significant Digit t i LSD Least Significant Digit 3 Enter a data address and a result address If we select a data address of 201 and a result address of 305 the AF1 establishes the data table format shown in Figure 3 3 Be careful not to select data and result addresses so close together that the addresses of the operands following the data address overlap your result address The data address eventually contains three digits of operand 1 The AF1 reserves the next three higher addresses for digits 4 through 6 of operand 1 and digits 1 through 6 of operand 2 The result address contains the most significant three digits of the result and the next higher address contains the least significant three digits 3 7 Chapter 3 Programming Figure 3 3 AF1 Addition Function Format After Address Entry BitNo 17 16 15 14 13 12 1110 7 6 5 4 3 2 1 0 S Digit 1 pi m Data Address MSD igit 2 Digit 3 201 Operand 1 4 Digit 4 Digit 5 n 202 2 MD Digit 2 Digit 3 203 Operand 2 lt Digit 4 Digit 5 rk 204 E SIDER Digit 1 Diai uU Result Address MSD igit 2 Digit 3 305
36. ively we obtain the result shown in Figure 3 24 when the average function executes The result appears in result words 305 and 306 as 256 333 3 27 Chapter 3 Programming Figure 3 24 AF1 Average Function Format After Execution BitNo 17 16 15 14 13 12 1110 7 6 5 4 3 2 1 2 Number of Inputs Word 0 0 3 200 Data Address S Input 1 0 4 1 3 201 S Input 2 0 2 3 5 202 S Input 3 0 1 2 1 203 Result Address E S D ER 2 5 6 Dos 0 0 1 0 Result 3 3 3 306 11587 Entry and Display of Input and Result Values Figure 3 25 shows one method you can use to enter values and display results of an AFI average function although there are several techniques for accomplishing this we chose get instructions The first rung requests an AF1 average function The top branch of the second rung shows the number of values to be averaged 003 in word 200 It also shows the numbers to be averaged in words 201 202 and 203 The lower branch of the second rung shows the resultant average as 256 333 in words 305 and 306 Figure 3 25 AF1 Average Function Input and Result Display Rungs Execute Aux Function Function Number 06 Data Addr 201 Result Addr 305 Storage 200 201 202 203 Bit 6 1 a a a 003 413 235 121 305 306 HL 18F 48 256 333 3 28 Chapter 3 Programming Error Message If you insert a zero for the
37. ond rung shows the two operands in its top branch and the resultant sum in its lower branch Figure 3 5 AF1 Addition Function Input and Result Display Rungs Execute Aux Function Function Number 01 Data Addr 201 Result Addr 305 Storage 201 202 203 204 Bit G 68 168 68 102 746 256 384 305 306 68 16 359 130 3 9 Chapter 3 Programming 3 10 Error Message If the resultant sum has more than six integers the error bit bit 14 is set indicating overflow AF1 Subtraction Function An AFI subtraction function operates on two 6 digit BCD numbers and presents the result in a third 6 digit BCD number XXX XXX 4XXK XXX XXK XXX How to Enter an AF1 Subtraction Function To program an AF1 subtraction function perform the following steps 1 Press SHIFT EAF or SHIFT SCT on the keyboard of your industrial terminal Figure 3 1 appears on the CRT 2 Enter 02 the function number for AF1 subtraction This entry identifies that the function entered is to perform an AF1 subtraction and that the processor use the data table format shown in Figure 3 6 when executed Operands 1 and 2 represent the two 6 digit numbers whose difference you want to find The six digits of operand 1 are represented in BCD by the group of bits labeled digit 1 through 6 Digit 1 and digit 6 are respectively This digit labeling system also applies to operand 2 and the result Cha
38. ors power and motion control devices man machine interfaces and sensors Allen Bradley is a subsidiary of Rockwell International one of the world s leading technology companies A With major offices worldwide 7 Algeria e Argentina e Australia e Austria e Bahrain e Belgium e Brazil e Bulgaria e Canada e Chile e China PRC e Colombia Costa Rica e Croatia e Cyprus e Czech Republic e Denmark e Ecuador e Egypt e El Salvador e Finland e France e Germany e Greece e Guatemala e Honduras Hong Kong e Hungary e Iceland e India e Indonesia e Israel e Italy e Jamaica e Japan e Jordan e Korea e Kuwait e Lebanon e Malaysia e Mexico e New Zealand e Norway e Oman e Pakistan e Peru e Philippines e Poland e Portugal e Puerto Rico Qatar e Romania e Russia CIS e Saudi Arabia e Singapore e Slovakia e Slovenia e South Africa Republic e Spain e Switzerland e Taiwan e Thailand e The Netherlands e Turkey United Arab Emirates e United Kingdom e United States e Uruguay Venezuela e Yugoslavia World Headquarters Allen Bradley 1201 South Second Street Milwaukee WI 53204 USA Tel 1 414 382 2000 Fax 1 414 382 4444 Publication 1772 6 5 1 March 1984 P N 955094 44 Copyright 1984 Allen Bradley Company Inc Printed in USA
39. plete ER Error Bit Set if number of inputs 0 11589 Entry and Display of Input and Result Values Figure 3 29 shows one method you can use to enter values and display results of an AFI standard deviation function Although there are several techniques for accomplishing this we chose the instructions The first rung requests an AF1 standard deviation function The top branch of the second rung shows the number of values whose standard deviation is sought 003 in word 200 it also shows the three numbers involved in words 201 202 and 203 The lower branch of the second rung shows the resulting standard deviation as 000 816 in words 305 and 306 Error Message If you insert a zero for the number of values whose standard deviation is sought the error bit bit 14 1s set and the result reads zero Chapter 3 Programming Figure 3 29 AF1 Standard Deviation Function Input and Result Display Rungs Execute Aux Function Function Number 07 Data Addr 201 Result Addr 305 Storage 200 201 202 203 Bit e H 4G 44 E 003 200 201 202 305 306 m ehka 000 816 AF1 BCD to Binary Conversion Function The AF1 BCD binary coded decimal to binary conversion function converts a BCD number from 0 to 4095 into a 12 bit binary number How to Enter an AF1 BCD to Binary Conversion Function To program an AF1 BCD to binary conversion function perform the following steps 1 Press SHIFT EAF
40. pter 3 Programming Figure 3 6 General AF1 Subtraction Function Word and Digit Format BitNo 17 16 15 14 13 12 1110 7 6 5 4 3 2 1 0 Diait 1 Data Address S MED Digit 2 Digit 3 m Operand 1 4 Digit 4 Digit 5 LSD m 1 Digit 1 m S MSD Digit 2 Digit 3 m 2 Operand 2 lt Digit 4 Digit 5 L8 m 3 Diait 1 Result Address Result Digit 4 Digit 5 Di n 1 E Enable Bit 1 Function in Progress S Sign Bit 1 Negative D Done Bit 1 Function Complete ER Error Bit 1 Overflow MSD Most Significant Digit LSD Least Significant Digit 3 11 Chapter 3 Programming 3 Enter a data address and result address If we select a data address of 201 and a result address of 305 the AF1 establishes the data table format shown in Figure 3 7 The data address eventually contains three digits of operand 1 The AF1 reserves the next three higher addresses for digits 4 through 6 of operand 1 and digits 1 through 6 of operand 2 The result address contains the most significant three digits of the result and the next higher address contains the least significant three digits Figure 3 7 AF1 Subtraction Function Format After Address Entry BitNo 17 16 15 14 13 12 1110 7 6 5 4 3 2 1 0 Digit 1 Data Address MED Digit 2 Digit 3 201 Operand 1 lt Digit 4 Digi
41. ress SHIFT EAF or SHIFT SCT on the keyboard of your industrial terminal Figure 3 1 appears on the CRT Figure 3 1 Execute Auxiliary Function Format Execute Aux Function Function Number 01 Data Addr 010 Numbers shown are default values and must be replaced Result Addr 010 by your values The number of default address digits originally displayed 3 or 4 depends on the size of the data table 3 6 Chapter 3 Programming 2 Enter 01 the function number for AF1 addition This entry identifies that the function entered is to perform an AF1 addition and that the processor use the data table format shown in Figure 3 2 when executed Operands 1 and 2 represent the two 6 digit numbers you wish to add The six digits of operand 1 are represented in BCD by the groups of bits labeled digit 1 through 6 Digit 1 and digit 6 are the most significant and the least significant digits respectively This digit labeling system also applies to operand 2 and the result Figure 3 2 General AF1 Addition Function Word and Digit Format BitNo 17 16 15 14 13 12 1 10 7 6 5 4 3 2 1 0 ET Data Address S Pir Digit 2 Digit 3 m MSD 9 g Operand 1 lt Digit 6 Digit 4 Digit 5 e m1 f S Digit 1 Bo Bs E MSD igit igit 3 Operand 25 Digit 6 Digit 4 Dig
42. s associated with static discharges 2 1 Chapter 2 Installation Installation The AFI fits into a 28 pin ZIF zero insertion force socket which is located under a hinged door at the lower side of the Mini PLC 2 15 processor Figure 2 1 Figure 2 1 PROM Socket MSN lH LJ 10715 1 On the underside of the PROM door is a label that illustrates PROM installation The notch on the AF1 PROM when installed must correspond to the notch shown on the label Figure 2 2 shows a properly installed AF1 Figure 2 2 AF1 Installed PROM Notch Lock 2 2 OFF PROM Installation ff f f f f f IL LII Tr r i D 1772 AF1 DO NOT ERASE Cuuuucuugumuuuuiu E lt Release 11590 Chapter 2 Installation To access the PROM socket remove the Mini PLC 2 15 processor module from the I O chassis If you desire to maintain processor memory contents connect an external battery pack Figure 2 3 to the processor with the Mini Processor Transport Cable cat no 1772 CD prior to removing the module from the chassis Figure 2 3 External Battery Backup Battery Pack Cat No 1771 BB d Mini PLC 2 15 Processor o Cat No 1772 LV e wW Mini Processor Transport Cable Cat No 1772 CD
43. t 5 LD 202 Digit 1 T 7 S MSD Digit 2 Digit 3 203 Operand 2 lt Digit 4 Digit 5 n b 56 Digit 1 T u Result Address E S DIER MSD Digit 2 Digit 3 305 Result Digit 4 Digit 5 n by Se E Enable Bit 1 Function in Progress S Sign Bit 1 Negative D Done Bit 1 Function Complete ER Error Bit 1 Overflow MSD Most Significant Digit LSD Least Significant Digit 11485 3 12 Chapter 3 Programming 4 Enter values for operands 1 and 2 You can enter these values from the keyboard of your industrial terminal or through ladder diagram functions Entry of operand 1 102746 and operand 2 256384 produces the result 153638 when the subtraction function executes Figure 3 8 shows how the result is stored Figure 3 8 AF1 Subtraction Function Format After Execution Bit No 17 16 15 14 13 12 11107 6 5 4 3 2 1 0 S Data Address 0 0 2 201 Operand 1 lt 7 4 6 202 0 2 5 6 203 Operand 2 lt 3 8 4 204 E IS D ER Result Address 0 1 1 0 5 3 305 Result 6 3 8 306 E Enable Bit 1 Function in Progress S Sign Bit 1 Negative D Done Bit 1 Function Complete ER Error Bit 1 Overflow 11486 Entry and Display of Input and Result Values Figure 3 9 shows one method for inserting input values and displaying input values and results of AF1 subtraction computations Although t
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