Instruction manual

4. SERVO SYSTEM CPU DEVICES
4 − 14
2) When executing positioning by switching the JOG instruction ON, the
START accept flag will switch OFF when positioning is stopped by a
JOG instruction OFF.
3) The START accept flag is ON when the manual pulse generator is
enabled (M2051 to M2053:ON), and is OFF when the manual pulse
generator is disabled (M2051 to M2053:OFF).
4) The START accept flag is ON during a current value change being
executed by a sequence program CHGA instruction.
The START accept flag will switch OFF when the current value change
is completed.
CHGA instruction
START accept flag
OFF
ON
Current value
change processing
OFF at current value change
completion
5) When M2000 is OFF, execution of a SVST instruction causes the start
accept flag to come ON; the flag goes OFF when M2000 comes ON.
PLC READY (M2000)
SVST instruction
OFF
ON
START accept flag
OFF
ON
CAUTION
The user must not turn start accept flags ON/OFF.
• If a start accept flag that is ON is switched OFF with the sequence program or a peripheral
device, no error will occur but the positioning operation will not be reliable.
Depending on the type of machine, it might operate in an unanticipated manner.
• If a start accept flag that is OFF is switched ON with the sequence program or a peripheral
device, no error will occur at that time, but the next time an attempt is made to start the axis a
start accept flag ON error will occur and the axis will not start.