Omron CPM1 Programming Manual page 501

Word(s) Bit(s)
SR 252 00 High-speed Counter Reset Bit
01 to 03 Not used.
04 Pulse Output 0 PV Reset Bit
Turn ON to clear the PV of pulse output 0.
05 Pulse Output 1 PV Reset Bit
Turn ON to clear the PV of pulse output 1.
06, 07 Not used.
08 Peripheral Port Reset Bit
Turn ON to reset the peripheral port. Automatically turns OFF when reset is complete.
09 RS-232C Port Reset Bit
Turn ON to reset the RS-232C port. Automatically turns OFF when reset is complete.
10 PC Setup Reset Bit
Turn ON to initialize PC Setup (DM 6600 through DM 6655). Automatically turns OFF
again when reset is complete. Only effective if the PC is in PROGRAM mode.
11 Forced Status Hold Bit (See note.)
OFF: The forced status of bits that are forced set/reset is cleared when switching be-
ON: The status of bits that are forced set/reset are maintained when switching between
The PC Setup can be set to maintain the status of this bit when the PC is turned off.
12 I/O Hold Bit (See note.)
OFF: IR and LR bits are reset when starting or stopping operation.
ON: IR and LR bit status is maintained when starting or stopping operation.
The PC Setup can be set to maintain the status of this bit when the PC is turned off.
13 Not used.
14 Error Log Reset Bit
Turn ON to clear error log. Automatically turns OFF again when operation is complete.
15 Not used.
SR 253 00 to 07 FAL Error Code
The error code (a 2-digit number) is stored here when an error occurs. The FAL number
is stored here when FAL(06) or FALS(07) is executed. This word is reset (to 00) by
executing a FAL 00 instruction or by clearing the error from a Programming Device.
08 Battery Error Flag
Turns ON when the CPU Unit backup battery's voltage is too low.
09 Cycle Time Overrun Flag
Turns ON when a cycle time overrun occurs (i.e., when the cycle time exceeds 100 ms).
10,11 Not used.
12 Changing RS-232C Setup Flag
Turns ON when the RS-232C port's settings are being changed.
13 Always ON Flag
14 Always OFF Flag
15 First Cycle Flag
Turns ON for 1 cycle at the start of operation.
SR 254
00 1-minute clock pulse (30 seconds ON; 30 seconds OFF)
01 0.02-second clock pulse (0.01 second ON; 0.01 second OFF)
02 Negative (N) Flag
03 Not used.
04 Overflow (OF) Flag
Turns ON when an overflow occurs in a signed binary calculation.
05 Underflow (UF) Flag
Turns ON when an underflow occurs in a signed binary calculation.
06 Differential Monitor Complete Flag
Turns ON when differential monitoring is completed.
07 STEP(08) Execution Flag
Turns ON for 1 cycle only at the start of process based on STEP(08).
08 to 15 Not used.
tween PROGRAM mode and MONITOR mode.
PROGRAM mode and MONITOR mode.
Function
Appendix C
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