Schneider Electric Processor Adapter - Manual (Page 409)

Ladder Logic Elements and Instructions
870 USE 101 10 V.2 409
Standard Ladder Logic Elements, Continued
Standard Ladder
Logic
Instructions,
Continued
Symbol Meaning Nodes Consumed
Other Special Purpose Instructions
CKSM Calculates any of four types of checksum
operations (CRC-16, LRC, straight CKSM,
and binary add) 3
MSTR Specifies a function from a menu of
networking operations 3
PID2 Performs proportional-integral-derivative
calculations for closed-loop control 3
TBLK Moves a block of data from a table to
another specified block area 3
BLKT Moves a block of registers to specified
locations in a table 3
XMIT Allows CPU to act as a Modbus master 3