Instruction types

[chad]

I have a 90-30 with some output instructions that I dont know like (RM) (SM) (^) what are these if you can help thanks chad ainsworth

[Steve Bailey]

-(SM)- is a retentive latch instruction (Set) -(RM)- is the corresponding unlatch (Reset) Retentive means that the coil will resort to its former state following a power interruption or other stoppage of the PLC. The corresponding non-retentive instructions are: -(S)- and -{R}- The -(^)- instruction is a positive transition (one-shot) coil. Edited November 16, 2006 by Steve Bailey

[chad]

Thank you some much steve on the move instruction what is in Q len thanks for the help chad Edited November 16, 2006 by chad

[Steve Bailey]

The MOVE instruction should realy be called COPY. It copies the data at the IN node to the address defined at the Q node. The data at the IN node can be a constant or the value from a register. The LEN parameter defines how many words are copied. If you have a MOVE instruction with a LEN parameter of 2, CONST 5 at the IN node, and %R00100 at the Q node, when enabled, it will place the value of 5 in registers %R00100 and %R00101. The same instruction but with %R00001 at the IN node will copy the value in %R00001 to %R00100 and the value in %R00002 to %R00101.

[chad]

I have a few more question what is a upctr rol_word pid_ind where can i get a manual for all the instructions for a ge 90-30

[RussB]

4.= http://globalcare.gefanuc.com/search/glbCareProdManuals.asp3. PID Proportional Integral Derivative, Independant 2. Rotate Left _ Word 1. Up Counter Edited November 20, 2006 by RussB

[Steve Bailey]

At the url that Russ provided, I recommend the manual GFK-0467. That is the Logicmaster 90-30 reference manual. Logicmaster is obsolete software, but the manual provides a good description of the available functions.

[chad]

what would the rotate word left be in an allien bradley i dont see a simulare instruction

[Steve Bailey]

The ROL instruction is essentially a BSL instruction, set up for wraparound operation.