Chapter 12 - AutomationDirect
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1. Loading a constant of 202 into V7700 identifies MSB LSB two input and two output analog channels and LI sets the I O data type to BCD ee 12 Loading a constant of 8282 into V7700 ee isb identifies two input and two output analog channels and sets the I O data type to binary HIGH BYTE Structure of V7701 V7701 is a system parameter that points to a V memory location used for storing analog input data The V memory location loaded in V7701 is an octal number identifying the first V memory location for the analog input data This V memory location is user selectable For example loading O2000 using the LDA instruction causes the pointer to write Ch 1 s data value to V2000 and Ch 2 s data value to V2001 DL05 06 Option Modules User Manual 7th Ed Rev A 08 11 12 7 Chapter 12 FO 2AD2DA 2 2 Ch In 2 Ch Out Analog Voltage Combination EE Structure of V7702 V7702 is a system parameter that points to a V memory location used for storing analog output data The V memory location loaded in V7702 is an octal number identifying the first V memory location for the analog output data This V memory location is user selectable For example loading O2010 using the LDA instruction causes the pointer to write Ch 1 s datavalue from V2010 and Ch 2 data value from V2011 You will find an example program that loads2. FO 2AD2DA 2 2 CH APTER IN 2 CH OUT ANALOG VOLTAGE COMBINATION In This Chapter Module Specification scs 4 48 esee ue dons o sueeis e a a a on ate andes 12 2 Setting the Module Jumpers 12 4 Connecting and Disconnecting the Field Wiring 12 5 Wiring Diagram 6 06 ic cee ee ee eee ae Oe RE ss sous ee EES 12 5 Module Operation s 2 445341 ae ee doe nt ns bce aera eee imine wo 12 6 Special V memory Locations 12 7 Using the Pointer in Your Control Program 12 10 Scale Conversions sparis ee ese ee ORLA OE dee eee eee ee eee 12 12 Module Resolution 4 4554544ss440 sum eee ewes ees odes ede cen 12 15 Analog Input Ladder Logic Filter 12 16 Chapter 12 FO 2AD2DA 2 2 Ch In 2 Ch Out Analog Voltage Combination EE Module Specifications The F0 2AD2DA 2 Analog Combination module offers the following features The analog input and output channels are updated in one scan e The module has a removable terminal block which makes it possible to remove the module without disconnecting the field wiring e Analog inputs can be used as process variables for the four 4 PID loops in the DLO5 and the eight 8 PID loops in the DLO6 CPUs e On board active analog filtering and RISC like microcontroller provide digital signal processing to maintai
3. 100 ppm C typical ut Specifications 2 single ended one common Output Range 0 to 5 VDC or 0 to 10 VDC jumper selectable Resolution 12 bit 1 in 4096 Conversion Settling Time 50uS for full scale change Crosstalk 1 2 count maximum 80db Peak Output Voltage 15 VDC power supply limited 0 1 of range 0 4 of range Linearity Error end to end 1 count 0 075 of full scale maximum Output Stability 2 counts Load Impedance 2KQ minimum Load Capacitance 0 01 uF maximum Accuracy vs Temperature 50 ppm C typical One count in the specification table is equal to one least significant bit of the analog data value 1 in 4096 DL05 06 Option Modules User Manual 7th Ed Rev A 08 11 12 3 Chapter 12 FO 2AD2DA 2 2 Ch In 2 Ch Out Analog Voltage Combination EE General Specifications 2 input channels per scan PLC Update Rate 2 output channels per scan 16 bit Data Word 12 binary data bits Operating Temperature 0 to 60 C 32 to 140 F Storage Temperature 20 to 70 C 4 to 158 F Relative Humidity 5 to 95 non condensing Environmental Air No corrosive gases permitted Vibration MIL STD 810C 514 2 Shock MIL STD 810C 516 2 Noise Immunity NEMA ICS3 304 Power Budget Requirement 50 mA 5 VDC supplied by base External Power Supply 30 mA 24 VDC 10 Connector Phoenix Mecano Inc
4. Conversion Program The following example program shows how you would write the program to convert the engineering unit to the output data format 0 4095 This example assumes you have calculated or loaded the engineering unit values between 0 1000 in BCD format and stored them in V2300 and V2301 for channels 1 and 2 respectively Both the DLOS and DLO06 offer instructions that allow you to perform math operations using BCD format It is usually easier to perform any math calculations in BCD and then convert the value to binary before you send the data to the module SP1 LD The LD instruction loads the engineering units used with channel 1 into V2300 the accumulator This example assumes the numbers are BCD Since SP1 is used this rung automatically executes on every scan You could also use an X C etc permissive contact MUL K4095 Multiply the accumulator by 4095 12 DIV Divide the accumulator by 1000 this is the maximum value of K1000 V2300 OUT Store the BCD result in V2010 the V memory location set up to V2010 send the data to Ch 1 output SP1 LD The LD instruction loads the engineering units used with Ch 2 into the V2301 accumulator This example assumes the numbers are BCD Since SP1 is used this rung automatically executes on every scan You could also use an X C etc permissive contact MUL K4095 Multiply the accumulator by 4095 DIV Divide the accu
5. and outputs the analog signal is either converted into 4096 counts or a count value will produce a proportional analog output In either situation the count range will be from 0 4095 212 For example with an output range of 0 to 10V send a 0 to get a OV signal and send 4095 to get a 10V signal This is equivalent to a binary value of 0000 0000 0000 to 1111 1111 1111 or 000 to FFF hexadecimal Each count can also be expressed in terms of the signal level by using the following equation n H L Resolution 4095 H high limit of the signal range L low limit of the signal range The following table shows the smallest detectable signal change that will result in one LSB change in the data or the amount of change in the output signal that each increment of the count value will produce Divide By Smallest detectable Voltage Range Signal Span or Produced Change 0 to 5V 5 volts 4095 1 22 mV 0 to 10V 10 volts 4095 2 44 mV DL05 06 Option Modules User Manual 7th Ed Rev A 08 11 12 15 Chapter 12 F0 2AD2DA 2 2 Ch In 2 Ch Out Analog Voltage Combination COC Analog Input Ladder Logic Filter PID Loops Filtering Please refer to the PID Loop Operation chapter in the DLO06 or DL05 User Manual for information on the built in PV filter DL05 06 and the ladder logic filter DL06 only shown below A filter must be used to smooth the analog input value when auto tuning PID loops to prevent giving a false indi
6. appropriate values to V7700 V7701 and V7702 on page 12 10 12 8 DL05 06 Option Modules User Manual 7th Ed Rev A 08 11 Chapter 12 F0 2AD2DA 2 2 Ch In 2 Ch Out Analog Voltage Combination a DL06 Data Formatting Special V memory locations are assigned to the four option module slots of the DLO6 PLC The table below shows these V memory locations which can be used by the FO 2AD2DA 2 Analog Combination Module DLO6 Special V memory Locations 1 Slot No Number of Channels Setup Data Type and Number of Channels V memory locations 700 710 720 and 730 are used for identifying the number of output channels the number of input channels and the data type binary or BCD The low byte equals the number of output channels and the high byte equals the number of input channels Enter a 1 or 2 to select the number of input and output channels to be used A zero 0 entered for channel selection will cause the channel either input or output to be inoperative For example with a module installed in slot 1 by MSB LSB loading a constant of 202 into V700 identifies two TT input and two output analog channels and sets the LOW BYTE T O data type to BCD And loading a constant of 8282 into V700 MSP identifies two input and two output analog HIGH BYTE channels and sets the I O data type to binary Input Stora
7. limit of the engineering unit ranae For example if you wanted to measure pressure PSI from 0 0 to 100 0 then you would have to multiply the analog value by 10 in order to imply a decimal place when you view the value with the programming software or a handheld programmer Notice how the calculations differ when you use the multiplier Analog Value of 2024 slightly less than half scale should yield 49 4 PSI Example without multiplier Example with multiplier we qa H L rs H L Units A 4005 L Units 10A 4095 L a 100 0 its 100 0 Units 2024 4095 0 Units 20240 4095 0 Units 49 Units 494 12 12 DL05 06 Option Modules User Manual 7th Ed Rev A 08 11 Chapter 12 F0 2AD2DA 2 2 Ch In 2 Ch Out Analog Voltage Combination a The Conversion Program The following example shows how you would write the program to perform the engineering unit conversion from the input data format 0 4095 This example assumes the raw input data read at V2000 is in BCD format Note this example uses SP1 which is always on You could also use an X C etc permissive contact SP1 LD When SP1 is on load Ch 1 data to the accumulator v2000 MUL Multiply the accumulator by 1000 for the range of 0 1000 K1000 DIV Divide the accumulator by 4095 the module resolution K4095 OUT Store the result in V2100 V2100 Output
8. location V1400 to the real number V1400 filtered value in the accumulator and stores the result in the accumulator OUTD Copies the value in the accumulator to 1400 location 1400 Converts the real number in the __ RTOB accumulator to a binary value and stores the result in the accumulator Loads the binary number filtered value from OUT the accumulator into location V1402 to use in v1402 your application or PID loop 12 16 DL05 06 Option Modules User Manual 7th Ed Rev A 08 11 Chapter 12 F0 2AD2DA 2 2 Ch In 2 Ch Out Analog Voltage Combination method in BCD format to get the analog value it must be converted to binary BIN as shown below If you NOTE Be careful not to do a multiple number conversion on a value For example if you are using the pointer are using the pointer method in Binary format the conversion to binary BIN instruction is not needed Using BCD Data Format ae Loads the analog signal which is in BCD format LDD and has been loaded from V memory location V2000 V2000 into the accumulator Contact SP1 is always on BIN Converts a BCD value in the accumulator to binary BTOR Converts the binary value in the accumulator to a real number Subtracts the real number stored in location V1400 from the real number in the accumulator SBR and stores the result in the accumulator V1400 is the designated workspace in this example Mult
9. 2 2 Ch In 2 Ch Out Analog Voltage Combination el Connecting and Disconnecting the Field Wiring Wiring Guidelines Your company may have guidelines for wiring and cable installation If so you should check those before you begin the installation Here are some general things to consider e Use the shortest wiring route whenever possible e Use shielded wiring and ground the shield at the transmitter source Do not ground the shield at both the module and the source e Do not run the signal wiring next to large motors high current switches or transformers This may cause noise problems e Route the wiring through an approved cable housing to minimize the risk of accidental damage Check local and national codes to choose the correct method for your application The FO 2AD2DA 2 will require an external power supply with a rating of 18 0 26 4VDC at 30 mA To remove the terminal block disconnect power to the PLC and the field devices Pull the terminal block firmly until the connector separates from the module You can remove the analog module from the PLC by folding out the retaining tabs at the top and bottom of the module As the retaining tabs pivot upward and outward the module s connector is lifted out of the PLC socket Once the connector is free you can lift the module out of its slot Wiring Diagram Use the following diagram to connect the field wiring If necessary the FO 2AD2DA 2 terminal block can be removed to
10. OUT The octal address 02000 is stored here V7701 is assigned to the V7701 option slot and acts as a pointer which means the CPU will use the octal value in this location to determine exactly where to store the incoming data This loads an octal value for the first V memory location that will be used LDA to store the output data For example the 02010 entered here using the 02010 LDA instruction would designate the following addresses Ch1 2010 Ch2 V2011 OUT The octal address 02010 is stored here V7702 is assigned to the V7702 option slot and acts as a pointer which means the CPU will use the octal value in this location to determine exactly where to store the output data 12 10 DL05 06 Option Modules User Manual 7th Ed Rev A 08 11 Chapter 12 F0 2AD2DA 2 2 Ch In 2 Ch Out Analog Voltage Combination DLO06 Pointer Method Use the special V memory table as a guide to setup the pointer values in the following example for the DLO Slot 1 is the left most option slot The CPU will examine the pointer values at these locations only after a mode transition first scan only Slot No Analog Combination Module DLO6 Special V memory Locations Number of Channels Input Pointer Output Pointer The F0 2AD2DA 2 can be installed in any available DLO6 option slot Using the example program from the previous page but changing the V memory addresses the ladder diagram below shows ho
11. Part No AK1550 8 3 5 green Connector Wire Size 28 16 AWG Connector Screw Torque 0 4 Nm Connector Screwdriver Size DN SS1 recommended Setting the Module Jumpers The position of the J2 jumpers determines the input and output signal levels You can choose between 0 5 VDC or 0 10 VDC The module ships with the jumpers connecting the pins In this position the input and output signal level is 0 5 VDC To select 0 10 VDC signals use the jumper setting chart located on the module One or more channels can be selected for 0 10 VDC input and output signal level by removing the jumper from the connecting pins of the appropriate channel This will allow you to have one channel selected for a 0 5 VDC signal and another channel selected for a 0 10 VDC signal J2 jumpers shown below are O0000000 configured as CH1 INPUT and CH2 OUTPUT both set for 10V CH2 INPUT and CH1 OUTPUT both set for 5V 2 JUMPERS 4 ale m o o F0 2AD2DA 2 Refer to jumper setting chart 2 2 2 2 disconnect power to the PLC and all field devices Failure to disconnect power can result in damage to WARNING Before removing the analog module or the terminal block on the face of the module the PLC and or field devices 12 4 DL05 06 Option Modules User Manual 7th Ed Rev A 08 11 Chapter 12 F0 2AD2DA
12. ads an octal value for the first V memory location that will be used to store the incoming data For example 02000 entered here using the LDA instruction would designate the following addresses Ch1 V2000 Ch2 V2001 The octal address 02000 is stored here V701 is assigned to the first option slot and acts as a pointer which means the CPU will use the octal value in this location to determine exactly where to store the in coming data This loads an octal value for the first V memory location that will be used to store the output data For example 02010 entered here using the LDA instruction would designate the following addresses Ch1 V2010 Ch2 V2011 The octal address 02010 is stored here V702 is assigned to the first first slot and acts as a pointer which means the CPU will use the octal value in this location to determine exactly where to store the output data 12 11 DL05 06 Option Modules User Manual 7th Ed Rev A 08 11 Chapter 12 FO 2AD2DA 2 2 Ch In 2 Ch Out Analog Voltage Combination EE Scale Conversions Scaling the Input Data Many applications call for measurements in engineering units which can be more meaningful than raw data Convert to engineering units using the Units a SL 4 L formula shown to the right 4095 You may have to make adjustments to the formula H High limit of the engineering depending on the scale you choose for the engineering unit range units L Low
13. cation of loop characteristics Smoothing the Input Signal DL06 only The filter logic can also be used in the same way to smooth the analog input signal to help stabilize PID loop operation or to stabilize the analog input signal value for use with an operator interface display etc WARNING The built in and logic filters are not intended to smooth or filter noise generated by improper field device wiring or grounding Small amounts of electrical noise can cause the input signal to bounce considerably Proper field device wiring and grounding must be done before attempting to use the filters to smooth the analog input signal Using Binary Data Format SP1 TT Loads the analog signal which is in binary format LD and has been loaded from V memory location V2000 V2000 into the accumulator Contact SP1 is always on BTOR Converts the binary value in the accumulator to a real number Subtracts the real number stored in location V1400 from the real number in the accumulator SVBR and stores the result in the accumulator V1400 is the designated workspace in this example 12 Multiplies the real number in the accumulator by 0 2 the filter factor and stores the result in the MUER accumulator This is the filtered value The filter range is 0 1 to 0 9 Smaller filter factors increases filtering 1 0 eliminates filtering Adds the real number stored in __ ADDR
14. d to manage the data transfer This is discussed in more detail on the following page Special V memory Locations DLO5 DL06 PLC Read Inputs M Execute Application Program Read the data Scan N lt Ch 1 2 IN Ch 1 2 OUT Scan N 1 lt Ch1 2 IN Ch 1 2 OUT Store data Scan N 2 lt Ch 1 2 IN Ch 1 2 OUT Scan N 3 lt Ch 1 2 IN Ch 1 2 OUT y Scan N 4 Ch 1 2 IN Ch 1 2 OUT Write to Outputs 12 Analog Module Updates Even though the channel updates to the CPU are synchronous with the CPU scan the module asynchronously monitors the analog transmitter signals and converts each signal into a 12 bit binary representation This enables the module to continuously provide accurate measurements without slowing down the discrete control logic in the RLL program The module takes approximately 10 milliseconds to sense 95 of the change in the analog signal For the vast majority of applications the process changes are much slower than these updates NOTE If you are comparing other manufacturers update times step responses with ours please be aware that some manufacturers refer to the time it takes to convert the analog signal to a digital value Our analog to digital conversion takes only a few microseconds It is the settling time of the filter that is critical in determining th
15. e full update time Our update time specification includes the filter settling time DL05 06 Option Modules User Manual 7th Ed Rev A 08 11 Chapter 12 F0 2AD2DA 2 2 Ch In 2 Ch Out Analog Voltage Combination _ _ _ Special V memory Locations Formatting the Module Data The DLO5 and DL06 PLCs have three special V memory locations assigned to their respective option slots These V memory locations allow you to e specify the data format binary or BCD e specify the number of I O channels to scan 2 input and 2 output channels for the F0 2AD2DA 2 e specify the V memory locations to store the input data e specify the V memory locations to store the output data DL05 Data Formatting The table below shows the special V memory locations used by the DLO5 PLC for the analog combination modules Analog Combination Module DLO5 Special V memory Locations Data Type and Number of 1 0 Channels V7700 Input Storage Pointer V7701 Output Storage Pointer V7702 Structure of V7700 V memory location 7700 is used for identifying the number of output channels the number of input channels and the data type binary or BCD The low byte equals the number of output channels and the high byte equals the number of input channels Either a 1 or a 2 will be entered to select the number of input and output channels to be used A zero 0 entered for channel selection will cause the channel either input or output to be inoperative
16. ge Pointer V memory locations 701 711 721 and 731 are special locations used as a storage pointers for the analog input data With the analog module installed in slot 1 the V memory location loaded in V701 is an octal number identifying the first user V memory location to read the analog input data This V memory location is user selectable For example loading 2000 12 using the LDA instruction causes the pointer to write Ch 1 s data value to V2000 and Ch 2 s data value to V2001 Output Storage Pointer V memory locations 702 712 722 and 732 are special locations used as storage pointer for the analog output data With the analog module installed in slot 1 the V memory location loaded in V702 is an octal number identifying the first user V memory location to write the analog output data to This V memory location is user selectable For example loading 02010 using the LDA instruction causes the pointer to write Ch 1 s data value from V2010 and Ch 2 s data value from V2011 You will find an example program that loads appropriate values to V700 V701 and V702 on page 12 11 DL05 06 Option Modules User Manual 7th Ed Rev A 08 11 12 9 Chapter 12 F0 2AD2DA 2 2 Ch In 2 Ch Out Analog Voltage Combination EE Using the Pointer in Your Control Program DLO05 Pointer Method The DL05 CPU examines the pointer values the memory locations identified in V7700 V7701 and V7702 on the first scan only The example p
17. iplies the real number in the accumulator by 0 2 the filter factor and stores the result in the MOER accumulator This is the filtered value The filter range is 0 1 to 0 9 Smaller filter factors increases filtering 1 0 eliminates filtering Adds the real number stored in ADDR location V1400 to the real number V1400 filtered value in the accumulator and stores the result in the accumulator OUTD Copies the value in the accumulator to 1400 location V1400 Converts the real number in the RTOB accumulator to a binary value and Stores the result in the accumulator Converts the binary value in the accumulator BCD to a BCD number Note The BCD instruction is not needed for PID loop PV loop PV is a binary number Loads the BCD number filtered value from OUTD the accumulator into location V1402 to use in V1402 your application or PID loop DL05 06 Option Modules User Manual 7th Ed Rev A 08 11 12 17 DL05 06 Option Modules User Manual 7th Ed Rev A 08 11
18. make removal of the module possible without disturbing field wiring Transmitter Power Supply 7 7 Typical User Wiring ii Internal See NOTE 1 Aka Wiring CHI Analog In Out wire 2 In2 Out Voltage z nya Transmitter 4 s 0 10V IN amp Ato D 2 Converter CH2 2 wire Voltage Transmitter 4 ov 5 1 1 Ch1 Dto A IN CH 1 load 2k ohms our Voltage Source Converter K 2 osana 2 cha re ov a Voltage Source Converter ot p ov CH 2 load 4 212 2k ohms o J LC 4 a minimum Mal Resistance y y ov c ov E FO 2AD2DA 2 NOTE 1 Shields should be grounded at the signal source ES NOTE 2 Connect all external power supply pater i ov commons ower Supply Module Supply DL05 06 Option Modules User Manual 7th Ed Rev A 08 11 12 5 Chapter 12 F0 2AD2DA 2 2 Ch In 2 Ch Out Analog Voltage Combination LC m maeaea Module Operation Input Output Channel Scanning Sequence The DL05 and DLO06 read two channels of input and two channels of output data during each scan The CPU supports special V memory locations that are use
19. mulator by 1000 this is the maximum value of K1000 V2301 OUT Store the BCD result in V2011 the V memory location set up to send V2011 the data to Ch 2 output DL05 06 Option Modules User Manual 7th Ed Rev A 08 11 12 13 Chapter 12 F0 2AD2DA 2 2 Ch In 2 Ch Out Analog Voltage Combination Em Analog and Digital Value Conversions Sometimes it is useful to convert between the signal levels and the digital values This is especially helpful during machine startup or troubleshooting The following table provides formulas to make this conversion easier Range If you know the digital value If you know the analog signal level For example if you are using the 0 10V range and you need a 6V signal level use this formula to D STE A determine the digital value D that will be stored in D 4095 6v the V memory location that contains the data 10 D 409 5 6 D 2457 12 14 DL05 06 Option Modules User Manual 7th Ed Rev A 08 11 Chapter 12 F0 2AD2DA 2 2 Ch In 2 Ch Out Analog Voltage Combination eo Module Resolution Analog Data Bits The first twelve bits represent the analog data for both inputs and outputs in binary format MSB LSB Bit Value Bit Value LL ssesas 0 1 6 64 119876543210 1 2 7 128 d 2 4 8 256 3 8 9 512 _ data bits 4 16 10 1024 5 32 11 2048 Resolution Details Since the module has 12 bit resolution for both inputs
20. n precise analog measurements in noisy environments PCT ETC 12 pa NOTE The DLOS CPU s analog feature for this module requires DirectSOFT32 Version 3 0c or later and firmware version 3 30 or later The DLO6 requires DirectSOFT32 version V4 0 build 16 or later and firmware version 1 00 or later See our website for more information www automationdirect com 12 DL05 06 Option Modules User Manual 7th Ed Rev A 08 11 Chapter 12 F0 2AD2DA 2 2 Ch In 2 Ch Out Analog Voltage Combination mm mme The following tables provide the specifications for the F0 2AD2DA 2 Analog Voltage Combination Module Review these specifications to make sure the module meets your application requirements Input Specifications Number of Channels 2 single ended one common Input Range 0 to 5 VDC or 0 to 10 VDC jumper selectable Resolution 12 bit 1 in 4096 Step Response 10 0 mS to 95 of full step change Crosstalk 1 2 count maximum 80db Active Low pass Filtering 3 dB at 300Hz 12 dB per octave Input Impedance Greater than 20KQ Absolute Maximum Ratings 15V Linearity Error End to End 2 counts 0 025 of full scale maximum Input Stability 1 count Gain Error 6 counts Offset Error 2 counts Maximum Inaccuracy 0 3 25 C 77 F 0 6 0 to 60 C 32 to 140 F Accuracy vs Temperature Number of Channels
21. rogram below shows how to setup these locations for 2 input channels and 2 output channels This rung can be placed anywhere in the ladder program or in the initial stage if you are using stage programming instructions This is all that is required to read the analog input data into V memory locations Once the data is in V memory you can perform mathematical calculations with the data compare the data against preset values and so forth V2000 and V2010 is used in the example but you can use any user V memory location SPO I LD Load a constant that specifies the number of channels to scan and the K202 data format The upper byte selects the input data format i e O BCD 8 Binary and the number of input channels set to either 1 or 2 for the or FO 2AD2DA 2 The lower byte selects the output data format i e 0 BCD 8 Binary and the number of output channels set to either 1 Fip or 2 K8282 The binary format is used for displaying data on some operator interface units The DLO5 PLCs support binary math functions OUT Special V memory location assigned to the option slot contains the data V7700 format and the number of channels to scan This loads an octal value for the first V memory location that will be used LDA to store the incoming data For example the 02000 entered here using 02000 the LDA instruction would designate the following addresses Ch1 12 V2000 Ch2 V2001
22. w to setup these locations for 2 input channels and 2 output channels with the module installed in slot1 of the DL06 Use the above table to determine the pointer values if locating the module in any of the other slot locations Place this rung anywhere in the ladder program or in the initial stage if you are using stage programming instructions Like the DLO5 example this logic is all that is required to read the analog input data into V memory locations Once the data is in V memory you can perform mathmatical calculations with the data compare the data against preset values and so forth V2000 and V2010 is used in the example but you can use any user V memory location SPO LD D K202 OUT V701 LDA 02010 OUT V702 Loads a constant that specifies the number of channels to scan and the data format The upper byte selects the input data format i e 0 BCD 8 Binary and the number of input channels set to either 1 or 2 for the F0 2AD2DA 2 The lower byte selects the output data format i e 0 BCD 8 Binary and the number of output channels set to either 1 or 2 The binary format can be used for displaying data on some operator interface units and on the DLO6 LCD display The DLO6 PLCs support binary math functions Special V memory location assigned to the first option slot contains the data format and the number of channels to scan This lo
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