DL105 PLC Special Relays
Contents
1. 5 Borrow on when the 32 bit subtraction instruction results in a borrow SP66 Half carry on when the 16 bit addition instruction results in a carry SP67 Carry when the 32 bit addition instruction results in a carry SP70 Sign on anytime the value in the accumulator is negative SP71 Invalid octal on when an Invalid octal number was entered This also occurs when number the V memory specified by a pointer P is not valid SP73 Overflow on if overflow occurs in the accumulator when a signed addition or subtraction results in an incorrect sign bit SP75 Data error on if a BCD number is expected and a non BCD number is encountered SP76 Load zero on when any instruction loads a value of zero into the accumulator SP100 X0 is on XO on for 1 scan after a pulse on XO occurs SP540 Current target value on when the counter current value equals the value in V2320 SP541 Current target value on when the counter current value equals the value in V2322 SP542 Current target value on when the counter current value equals the value in V2324 SP543 Current target value on when the counter current value equals the value in V2326 SP544 Current target value on when the counter current value equals the value in V2330 SP545 Current target value on when the counter current value equals the value in V2332 SP546 Current target value on when the counter current value equals the value in V2334 SP547 Current ta2. P567 Current target value on when the counter current value equals the value in V2376 DL105 PLC User Manual 3rd Edition ad x ipu ddy io ke D Q L D D D lt n
3. Special Relays In This Appendix DL105 PLC Special Relays Special Relays DL105 PLC Special Relays Special Relays are just contacts that are set by the CPU operating system to indicate a particular system event has occurred These contacts are available for use in your ladder program Knowing just the right special relay contact to use for a particular situation can save lot of programming time Since the CPU operating system sets and clears special relay contacts the ladder program only has to use them as inputs in ladder logic Startup and SPO First scan on for the first scan after a power cycle or program to run transition Real Time Relays only The relay is reset to off on the second scan It is useful where a function needs to be performed only on program startup SP1 Always ON provides a contact to insure an instruction is executed every scan SP3 1 minute clock on for 30 seconds and off for 30 seconds SP4 1 second clock on for 0 5 second and off for 0 5 second SP5 100 ms clock on for 50 ms and off for 50 ms SP6 50 ms clock on for 25 ms and off for 25 ms SP7 Alternate scan on every other scan CPU Status Relays SP12 Terminal on when the CPU is in the run mode run mode SP16 Terminal on when the CPU is in the program mode program mode SP20 Forced on when the STOP instruction is executed stop mode SP22 Interrupt enabled on when interrupts have
4. been enabled using the ENI instruction a S System Monitoring SP40 Critical error on when a critical error such as I O communication loss has xo occurred xo or SP41 Warning on when a non critical error such as a low battery has occurred OO 20 SP44 Program on when a memory error such as a memory parity error has Te memory error occurred 9 SP50 Fault instruction on when a Fault Instruction is executed SP51 Watch Dog on if the CPU Watch Dog timer times out timeout SP52 Grammatical on if a grammatical error has occurred either while the CPU is error running or if the syntax check is run V7755 will hold the exact error code SP53 Solve logic error on if CPU cannot solve the logic DL105 PLC User Manual 3rd Edition Accumulator Status HSIO Pulse Catch Relay Equal Relays for HSIO Mode 10 Counter Presets Special Relays SP60 Value less than on when the accumulator value is less than the instruction value SP61 Value equal to on when the accumulator value is equal to the instruction value SP62 Greater than on when the accumulator value is greater than the instruction value SP63 Zero on when the result of the instruction is zero in the accumulator SP64 Half borrow on when the 16 bit subtraction instruction results in a borrow SP6
5. rget value on when the counter current value equals the value in V2336 SP550 Current target value on when the counter current value equals the value in V2340 SP551 Current target value on when the counter current value equals the value in V2342 SP552 Current target value on when the counter current value equals the value in V2344 SP553 Current target value on when the counter current value equals the value in V2346 SP554 Current target value on when the counter current value equals the value in V2350 SP555 Current target value on when the counter current value equals the value in V2352 SP556 Current target value on when the counter current value equals the value in V2354 SP557 Current target value on when the counter current value equals the value in V2356 SP560 Current target value on when the counter current value equals the value in V2360 SP561 Current target value on when the counter current value equals the value in V2362 SP562 Current target value on when the counter current value equals the value in V2364 SP563 Current target value on when the counter current value equals the value in V2366 SP564 Current target value on when the counter current value equals the value in V2370 SP565 Current target value on when the counter current value equals the value in V2372 SP566 Current target value on when the counter current value equals the value in V2374 S
Download Pdf Manuals
Related Search