Siemens SIMATIC IM 151/CPU - Page 186

Instruction List
B-52
ET 200S Interface Module IM 151/CPU
A5E00058783-01
B.41 Instructions for the Master Control Relay (MCR)
MCR writes the value ”0” or leaves the memory contents unchanged.
MCR=0MCR is deactivated
MCR=1MCR is activated; ”T” instruction writes zeros to the corresponding
address IDs; ”S”/”R” instructions do not change the memory contents.
In-
struc-
tion
Address
ID
Description
Length
in
Words
Typical Execution Time in
s
MCR( Open a MCR zone.
Save the RLO to the MCR stack.
1 1.7
Status word for: MCR( BR A1 A0 OV OS OR STA RLO /FC
Instruction depends on: – – – – – – – Yes –
Instruction controls: – – – – – 0 1 – 0
)MCR Close an MCR zone.
Remove an entry from the MCR stack.
1 1.6
Status word for: )MCR BR A1 A0 OV OS OR STA RLO /FC
Instruction depends on: – – – – – – – – –
Instruction controls: – – – – – 0 1 – 0
MCRA Activate the MCR 1 0.3
MCRD Deactivate the MCR 1 0.3
Status word for: MCRA, MCRD BR A1 A0 OV OS OR STA RLO /FC
Instruction depends on: – – – – – – – – –
Instruction controls: – – – – – – – – –