Siemens CPU 414-2 - Instructions for the Master Control Relay (MCR)

Instructions for the Master Control Relay (MCR)
97
S7-400 Instruction List
A5E00267845-01
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-
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