High−level Instructions
3 − 535
Precautions during programming
The high −speed counter control flag R903A (R903C) is on from the time that the execution condition for the
F174 (SP0H) instruction has gone on until the pulse output stops.
During the time that the high−speed counter control flag R903A (R903C) is on, the high−speed counter and
pulse output instructions F166 to F176, which use the same control flag, cannot be executed.
During the time that the circular interpolation control flag R904E is on, the pulse output instructions F166 to
F176 cannot be executed.
An operation error occurs if a value that is not within the allowable range is specified for the control code or for
frequency 1. (If the data for frequency 1 is 0, the operation is terminated without anything being executed.)
Pulse output is stopped if the frequency of the second or a subsequent stage is specified as 0 or as a value
outside the allowable range.
If the table pointer exceeds the data register DT area during pulse output, pulse output control stops and the
high−speed counter control flag R903A (R903C) goes off.
Always make sure that the target values are specified within the ranges indicated on the following page. If a
value outside the allowable range is specified, the number of pulses output will be different from the specified
value.
If a periodic interrupt or high−speed counter value interrupt program is run, or the PLC link function is used at
the same time, a frequency of 80 kHz or less should be used.
Note: With FP−X, refer to the table of areas used for the internal relay equivalent to R903A (R903C).
When using this instruction for FP−X, set the pulse output by the system register.
Flag conditions
・Error flag (R9007): Turns on and stays on when:
・Error flag (R9008): Turns on for an instant when:
− The area is exceeded when an index modifier is used.
− The “n” is other than 0 or 2.
− The control code or frequency 1 is outside setting range.
− With the FP−X, the pulse output has not been set by the system register.
FPΣ/FP−X
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