Instructions for the Master Control Relay (MCR)
97
S7-400 Instruction List
A5E00267845-01
Instructions for the Master Control Relay (MCR)
MCR=1
³
MCR is deactivated
MCR=0
³
MCR 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-
Address
ID
Description
Length
in
Execution Time in
s
Instruc-
tion
Address
ID
Description
Length
in
Words
CPU 412
CPU 414
CPU 416
CPU 417
MCR(
Open an MCR zone.
Save the RLO to the MCR stack.
1
0.1
0.06
0.04
0.03
Status word for:
MCR(
CC1
BR
CC0
OV
OS
OR
STA
RLO
/FC
Instruction evaluates:
–
–
–
–
–
–
–
Yes
–
Instruction affects:
–
–
–
–
–
0
1
–
0
)MCR
Close an MCR zone.
Pop an entry off the MCR stack.
1
0.1
0.06
0.04
0.03
Status word for:
)MCR
BR
CC1
CC0
OV
OS
OR
STA
RLO
/FC
Instruction evaluates:
–
–
–
–
–
–
–
–
–
Instruction affects:
–
–
–
–
–
0
1
–
0