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77
SR Area
Section 4-3
SR 248,
SR 249
00 to 15
High-speed Counter PV Area
The PVs can have the following values. The leftmost digit of SR 249 acts as the sign indi-
cator; a negative number is indicated when the leftmost digit of SR 249 is F.
Differential phase input mode:
–8,388,608 (F838 8608) to 8,388,607
Pulse +direction input mode:
–8,388,608 (F838 8608) to 8,388,607
Up/down pulse input mode:
–8,388,608 (F838 8608) to 8,388,607
Increment mode:
0 to 16,777,215
Synchronized pulse control:
0 to 20,000 Hz
(Can be used as work bits when the high-speed counter is not used.)
Read-
only
SR 250
00 to 15
Analog Setting 0
Used to store the 4-digit BCD set value (0000 to 0200) from analog control 0.
SR 251
00 to 15
Analog Setting 1
Used to store the 4-digit BCD set value (0000 to 0200) from analog control 1.
SR 252
00
High-speed Counter Reset Bit
Read/
write
01 to 03
Not used.
04
Pulse Output 0 PV Reset Bit
Turn ON to clear the PV of pulse output 0.
Read/
write
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.
Read/
write
09
RS-232C Port Reset Bit
Turn ON to reset the RS-232C port. Automatically turns OFF when reset is complete.
10
PLC Setup Reset Bit
Turn ON to initialize PLC Setup (DM 6600 through DM 6655). Automatically turns OFF
again when reset is complete. Only effective if the PLC 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 between
PROGRAM mode and MONITOR mode.
ON: The status of bits that are forced set/reset are maintained when switching between
PROGRAM mode and MONITOR mode.
The PLC Setup can be set to maintain the status of this bit when the PLC 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 PLC Setup can be set to maintain the status of this bit when the PLC 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.
Read/
write
15
Not used.
Word(s)
Bit(s)
Function
Read/
write
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