Omron CPM1 - PROGRAMING MANUAL 02-2001 Programming Manual page 598

Memory Areas
Word(s) Bit(s)
SR 252 00 Not used. (system use)
01 to 07 Not used.
08 Peripheral Port Reset Bit
Turn ON to reset peripheral port. (Not valid when Programming Device is
connected.) Automatically turns OFF when reset is complete.
09 RS-232C Port Reset Bit
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 PRO-
GRAM mode.
11 Forced Status Hold Bit
OFF: The forced status of bits that are forced set/reset is cleared when
ON: The status of bits that are forced set/reset are maintained when switch-
12 I/O Hold Bit
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.
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 Not used.
09 Cycle Time Overrun Flag
Turns ON when a cycle time overrun occurs.
10 to 11 Not used.
12 RS-232C Port Set Bit
Turn ON to set RS-232C port.
Turn OFF when reset is complete.
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 Flag
05 Underflow Flag
06 Differential Monitor Complete Flag
Turns ON when differential monitoring is complete.
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.
switching between PROGRAM mode and MONITOR mode.
ing between PROGRAM mode and MONITOR mode.
Function
Appendix C
Read/ Page
write
Read/
272
write
2
17
17
Read/ 555
write
Read- 385
only
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only l
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