8 Pulse Outputs
8-58
CJ2M CPU Unit Pulse I/O Module User’s Manual
8-8 Related Auxiliary Area Bits
Related Auxiliary Area Bits
Name Word/Bit Function
Read/
Write
Refresh timing
Pulse Output 0
PV
A276 to
A277
Contain the number of pulses output from the
corresponding pulse output port.
PV range: 8000 0000 to 7FFF FFFF hex
(−2,147,483,648 to 2,147,483,647)
When pulses are being output in the CW direc-
tion, the PV is incremented by 1 for each
pulse.
When pulses are being output in the CCW
direction, the PV is decremented by 1 for each
pulse.
PV after overflow: 7FFF FFFF hex
PV after underflow: 8000 0000 hex
A276, A278, A322, and A324 contain the
lower 4 digits.
A277, A279, A323, and A325 contain the
upper 4 digits.
Read • Cleared when power is
turned ON.
• Cleared when operation
starts.
• Cleared when Pulse Out-
put Reset Bit is turned ON.
• Cleared when pulse output
is started (when the origin
is not defined).
• Refreshed each cycle dur-
ing overseeing process.
• Refreshed when INI(880)
instruction is executed to
change the PV.
• Refreshed when
PRV(881) instruction is
executed to read the PV or
status.
Pulse Output 1
PV
A278 to
A279
Pulse Output 2
PV
A322 to
A323
Pulse Output 3
PV
A324 to
A325
Pulse Output 0
Pulse Output
Status Flag
A280.00 This flag will be ON when pulses are being
output from pulse output 0 to 3 according to an
ORG(889), ACC(888), PLS2(887), or
IFEED(892) instruction and the output fre-
quency is being changed in steps (accelerat-
ing or decelerating).
OFF: Constant speed,
ON: Accelerating/decelerating
Read • Cleared when power is
turned ON.
• Cleared when operation is
started or stopped.
• Refreshed each cycle
(overseeing processing).
Pulse Output 1
Pulse Output
Status Flag
A281.00
Pulse Output 2
Pulse Output
Status Flag
A326.00
Pulse Output 3
Pulse Output
Status Flag
A327.00
Pulse Output 0
PV Overflow/
Underflow
A280.01 This flag indicates when an overflow or under-
flow has occurred in the pulse output 0 PV.
OFF: Normal,
ON: Error
Read • Cleared when power is
turned ON.
• Cleared when start-
ing/stopping operation
• Cleared when the INI(880)
instruction is executed to
change the PV.
• Refreshed when under-
flow or overflow occurs.
Pulse Output 1
PV Overflow/
Underflow
A281.01
Pulse Output 2
PV Overflow/
Underflow
A326.01
Pulse Output 3
PV Overflow/
Underflow
A327.01
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