APP - 25
APPENDICES
*: Usable with AnN and AnA which are compatible with SFC.
For the AnN and AnA which are compatible with SFC, refer to the MELSAP-II Programming Manual.
Table App2.1  Special Relay List (Continue)
Number Name Description Details Applicable CPU
M9180
Active step 
sampling trace 
complete flag
OFF:Trace start
ON: Trace complete
• Turned on when sampling trace of all specified 
blocks is completed. Turned off when sampling 
trace is started.
—
Usable with AnN*, 
AnA*, AnU, 
A2AS, QCPU-A 
(A Mode), A2C, 
A0J2H, AnS, 
AnSH, A1FX and 
A52G.
M9181
Active step 
sampling trace 
execution flag
OFF:Trace not executed.
ON: Trace being 
executed.
• Turned on when sampling trace is being executed.
Turned off when sampling trace is completed or 
suspended.
—
Usable with AnN*, 
AnA*, AnU, 
A2AS, QCPU-A 
(A Mode), A2C, 
A0J2H, AnS, 
AnSH, A1FX and 
A52G.
*2
M9182
Active step 
sampling trace 
enable
OFF:Trace disable/
suspend
ON: Trace enable
• Selects sampling trace execution enable/disable.
ON: Sampling trace execution is enabled.
OFF: Sampling trace execution is disabled.
If turned off during sampling trace 
execution, trace is suspended.
—
Usable with AnN*, 
AnA*, AnU, 
A2AS, QCPU-A 
(A Mode), A2C, 
A0J2H, AnS, 
AnSH, A1FX and 
A52G.
*2
M9196
Operation 
output at block 
stop
OFF:Coil output off
ON: Coil output on
• Selects the operation output when block stop is 
executed.
ON: Retains the ON/OFF status of the coil being 
used by using operation output of the step 
being executed at block stop.
OFF: All coil outputs are turned off. (Operation  
output by the SET instruction is retained 
regardless of the ON/OFF status of M9196.)
—
Usable with AnN*, 
AnA*, AnU, 
A2AS, QCPU-A 
(A Mode), A2C, 
A0J2H, AnS, 
AnSH, A1FX and 
A52G.
M9197
Fuse blow, I/O 
verify error 
display 
switching
M9197
M9198
I/O numbers 
to be 
displayed
• Switches I/O numbers in the fuse blow module 
storage registers (D9100 to D9107) and I/O 
module verify error storage registers (D9116 to 
D9123) according to the combination of ON/OFF 
of the M9197 and M9198.
—
Usable with AnU, 
A2AS and QCPU-
A (A Mode)
OFF OFF X/Y0 to 7F0
ON OFF
X/Y800 to 
FF0
M9198
OFF ON
X/Y1000 to 
17F0
ON ON
X/Y1800 to 
1FF0
M9199
Data recovery 
of online 
sampling trace / 
status latch
OFF:Data recovery OFF
ON: Data recovery ON
• When sampling trace / status latch is executed, 
the setting data stored in the CPU module is 
recovered to enable restart.
• Turn on M9199 to execute again.
(There is no need to write data with the peripheral 
device.)
—
Usable with AnU, 
A2AS and QCPU-
A (A Mode)