Mitsubishi Electric Q26UD(E)HCPU User Manual page 489

(14)Process control instruction
Number Name
SM1500
OFF: No-hold
Hold mode
ON: Hold
SM1501
(15)Redundant system (host system CPU information
The special relay (SM1510 to SM1599) is valid only for redundant systems. All bits are set to off for stand-alone
systems.
Number Name
OFF: Redundant
SM1510 Operation mode
ON: Redundant
System A • Distinguishes between system A and system B.
SM1511
identification flag • The flag status does not change even if the tracking cable is
disconnected.
System B
SM1512
identification flag
OFF: Not in debug
Debug mode
SM1513
status flag
ON: Debug mode
Control system • Indicates operation system status.
SM1515
judgment flag • The flag status does not change even if the tracking cable is
disconnected.
Standby system
SM1516
judgment flag
OFF: Power supply on
CPU module
SM1517
startup status ON: Operation system
Standby system
ON
to control system
SM1518 OFF
switching status
flag
Previous Control
ON
System
SM1519 OFF
Identification
Flag
Meaning
Specifies whether or not to hold the
output value when a range over occurs
for the S.IN instruction range check.
Specifies whether or not the output value
is held when a range over occurs for the
S.OUT instruction range check.
Meaning
system backup
mode, stand-
This relay is on while the system is operating
alone system
in the separate mode.
system separate
mode
If TRK. CABLE ERR.
System A System B
(error code: 6210) occurred (Unknown)
SM1511 ON OFF
SM1512 OFF ON
This relay is on while the system is operating
mode
in the debug mode.
If TRK. CABLE ERR.
Control Standby
system system (error code: 6210) occurred (Unknown)
SM1515 ON OFF
SM1516 OFF ON
Turns on when the CPU module is started up
by the system switching (switching from the
startup standby system to the control system).
Remains OFF when the standby system is
switch start up switched to the control system by a power-
ON startup.
• This relay turns on during one scan after
the standby system was switched to the
1 scan
control system.
• This relay can be used only in a scan
execution type program.
When the previous control system is System
B, this relay turns on during one scan in
1 scan
System A, following the RUN state after both
Systems A and B were simultaneously turned
on or were reset.
Set by (When
Explanation
*1
)
Set by
Explanation
(When Set)
S (Every
END
processing)
S (Initial)
OFF
OFF
S (Initial)
S (Status
change)
OFF
OFF
S (Status
change)
S (Every
END
processing)
S (Every
END
processing)
APPENDICES
Correspondi
Correspondi
ng ACPU
Set) ng CPU
M9
QnPH
U New
QnPRH
Corresponding
Corresponding
ACPU
CPU
M9
New QnPRH
New QnPRH
New QnPRH
New QnPRH
New QnPRH
New QnPRH
New QnPRH
487
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