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Instructions For The Master Control Relay (mcr) - Siemens CPU 412-1 Instruction Manual

S7-400; cpu 412 series; cpu 414 series; cpu 416 series; cpu 417 series;.
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Instructions for the Master Control Relay (MCR)

MCR=1³MCR is deactivated
MCR=0³MCR is activated; "T" and "=" instructions write zeros to the
corresponding address identifiers if RLO = "0"; "S" and "R" instructions leave the memory contents unchanged.
Instruc-
Instruc-
Address
Address
ID
ID
tion
MCR(
Open an MCR zone.
Save the RLO to the MCR stack.
Status word for:
MCR(
Instruction evaluates:
Instruction affects:
)MCR
Close an MCR zone.
Pop an entry off the MCR stack.
Status word for:
)MCR
Instruction evaluates:
Instruction affects:
S7-400 Instruction List
A5E00267845-01
Length
Length
Description
Description
in
in
Words
1
CC1
BR
1
BR
CC1
Instructions for the Master Control Relay (MCR)
Execution Time in ms
CPU 412
CPU 414
0.1
0.06
CC0
OV
OS
0.1
0.06
CC0
OV
OS
CPU 416
CPU 417
0.04
0.03
OR
STA
RLO
Yes
0
1
0.04
0.03
OR
STA
RLO
0
1
/FC
0
/FC
0
97

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