APPENDICES
Appendix 1 Special Relay List
App
- 4
9
Device Explanation
10
CPU Module Processing
Time
11
Procedure for Writing
Program to CPU Module
Appendices
Index
(2) System information
*1: This applies to the CPU of function version B or later.
TableApp.3 Special relay
Number Name Meaning Explanation
Set by
(When Set)
Corres-
ponding
ACPU
M9
Corresponding CPU
SM202 LED OFF command
OFF ON : LED OFF
• When this relay goes from OFF to ON, the LEDs
corresponding to the individual bits at SD202 go off
UNew
QnA
Qn(H)
QnPH
QnPRH
SM203 STOP contact STOP status • Goes ON at STOP status S (Status change) M9042
SM204 PAUSE contact PAUSE status • Goes ON at PAUSE status S (Status change) M9041
SM205 STEP-RUN contact STEP-RUN status • Goes ON at STEP-RUN status S (Status change) M9054
QnA
Qn(H)
QnPH
QnPRH
SM206
PAUSE enable coil
OFF : PAUSE disabled
ON : PAUSE enabled
• PAUSE status is entered if this relay is ON when the
PAUSE contact goes ON
U M9040
Device test request
acceptance status
OFF : Device test not yet
executed
ON : Device test executed
• Comes ON when the device test mode is executed
on GX Developer.
S (Request) New Rem
SM210 Clock data set request
OFF : Ignored
ON : Set request
• When this relay goes from OFF to ON and after END
instruction execution of subsequent scan, clock data
stored in SD210 to SD213 are written to the CPU
module.
U M9025
SM211 Clock data error
OFF : No error
ON : Error
• ON when error is generated in clock data (SD210 to
SD213) value, and OFF if no error is detected.
S (Request) M9026
SM212 Clock data display
OFF : Ignored
ON : Display
• Displays clock data as month, day, hour, minute, and
second at the LED display at front of CPU
module.(Enabled only for Q3ACPU and Q4ACPU)
U M9027
Q3A
Q4A
Q4AR
SM213
Clock data read
request
OFF : Ignored
ON : Read request
• When this relay is ON, clock data is read to SD210 to
SD213 as BCD values.
U M9028
Rem
SM235
Online module change
flag
OFF : Online module change
is not in progress
ON : Online module change
in progress
Turns on during online module change. (for host PLC)
S (During online
module change)
New
QnPH
SM236
Online module change
complete flag
OFF :Online module change
incomplete
ON : Online module change
complete
• Turns ON for one scan after online module change is
complete.
• This contact point can only be used by the scan
program. (for host PLC)
S (When online
module change is
complete)
New
SM240 No. 1 CPU reset flag
OFF : No. 1 CPU reset
cancel
ON : No. 1 CPU resetting
• Goes OFF when reset of the No. 1 CPU is canceled.
• Comes ON when the No. 1 CPU is resetting
(including the case where the PLC is removed from
the base).
The other PLCs are also put in reset status.
S (Status change) New
Q00/Q01
*1
Qn(H)
*1
QnPH
SM241 No. 2 CPU reset flag
OFF : No. 2 CPU reset
cancel
ON : No. 2 CPU resetting
• Goes OFF when reset of the No. 2 CPU is canceled.
• Comes ON when the No. 2 CPU is resetting
(including the case where the PLC is removed from
the base).
The other PLCs result in "MULTI CPU DOWN" (error
code: 7000).
SM242 No. 3 CPU reset flag
OFF : No. 3 CPU reset
cancel
ON : No. 3 CPU resetting
• Goes OFF when reset of the No. 3 CPU is canceled.
• Comes ON when the No. 3 CPU is resetting
(including the case where the PLC is removed from
the base).The other PLCs result in "MULTI CPU
DOWN" (error code: 7000).
SM243 No. 4 CPU reset flag
OFF : No. 4 CPU reset
cancel
ON : No. 4 CPU resetting
• Goes OFF when reset of the No. 4 CPU is canceled.
• Comes ON when the No. 4 CPU is resetting
(including the case where the PLC is removed from
the base).The other PLCs result in "MULTI CPU
DOWN" (error code: 7000).
Qn(H)
*1
QnPH
SM244 No. 1 CPU error flag
OFF : No. 1 CPU normal
ON : No. 1 CPU during stop
error
• Goes OFF when the No. 1 CPU is normal (including
a continuation error).
• Comes ON when the No. 1 CPU is during a stop
error.
Q00/Q01
*1
Qn(H)
*1
QnPH
SM245 No. 2 CPU error flag
OFF : No. 2 CPU normal
ON : No. 2 CPU during stop
error
• Goes OFF when the No. 2 CPU is normal (including
a continuation error).
• Comes ON when the No. 2 CPU is during a stop
error.
SM246 No. 3 CPU error flag
OFF : No. 3 CPU normal
ON : No. 3 CPU during stop
error
• Goes OFF when the No. 3 CPU is normal (including
a continuation error).
• Comes ON when the No. 3 CPU is during a stop
error.