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Flag Operations during Pulse Output Section 4-4
4-4 Flag Operations during Pulse Output
The flags related to pulse outputs are refreshed at the following times.
• When PULS is executed
• When pulse output operation is started or stopped by SPED, ACC, PLS2,
INI, or ORG
• When the Reset Flag is turned ON
• When the operating status of the CPU Unit changes, i.e., when power is
turned ON or when operation is started or stopped
Relationship between Flag Changes and Refresh Timing
Note 1. ---: No change,
↑ ↓: Both ON and OFF, ↑: ON Only, ↓: OFF Only, 0: Cleared
to 0
2. Determined in the PLC Setup, addresses 268 and 286.
3. The PV and Overflow/Underflow Flags are cleared when a limit input turns
ON and the origin is set to be undefined.
PVs Accel/
Decel
Flags
Overflow/
Underflow
Output
Amount
Set
Output
Com-
pleted
Output In
Progress
Origin Not
Estab-
lished
Origin
Stop
PULS (886) --- --- --- ↑ --- --- --- ---
SPED(885) Changes --- ↑ ↓↓↑ ↓↑ ↓ --- ↑ ↓
ACC(888) Changes ↑ ↓↑ ↓↓↑ ↓↑ ↓ --- ↑ ↓
PLS2(887) Changes ↑ ↓↑ ↓↑ ↓↑ ↓ --- ↑ ↓
PWM(891) --- --- --- --- --- --- --- ---
INI(880) Changes ↓↓↓--- ↓↓↑ ↓
ORG
(889)
Origin
search
Changes ↑ ↓↓ --- --- ↑ ↓↑ ↓↑
Origin
return
Changes ↑ ↓ --- --- ↑ ↓↑ ↓ --- ↑
Operation starts 0 ↓↓↓↓↓↑---
Operation stops --- ↓ --- ↓↓↓--- ---
Reset Changes ↓↓--- --- ↓↑↓
Power ON 0 ↓↓↓↓↓↑↓
Stop at limit input
with origin held
(See note 2.)
Changes ↓ --- --- --- ↓ --- ---
Stop at limit input
with undefined ori-
gin (See note 2.)
0 (See
note 3.)
↓↓ (See
note 3.)
--- --- ↓↑---
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