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Chapter 8 High-speed counter, PWM / Pulse train output and Analogue I/O
8-20
(4) At setting abnormality
If the sum of the frequencies of the pulse outputs is set to exceed 5 k when the PI/O function setting flag (R7F5) is turned
on, the bit for the total pulse frequency abnormality in the error display special internal output turns on, and none of the
pulse outputs are output. In addition, individual setting of pulse outputs cannot be performed when the bit for the total
pulse frequency abnormality is turned on.
Bit:
1514131211109876543210
WRF057:
a Not used b c d e f g h i
Figure 8.36 Special internal output for input/output function abnormality
Bit Description of abnormality Related terminal
a Total pulse frequency abnormality Y100 to Y103
b Pulse 4 frequency abnormality Y103
c Pulse 3 frequency abnormality Y102
d Pulse 2 frequency abnormality Y101
e Pulse 1 frequency abnormality Y100
f Counter 4 preset value abnormality X6
g Counter 3 preset value abnormality X4
h Counter 2 preset value abnormality X2
i Counter 1 preset value abnormality X0
(5) Individual setting of pulse outputs
It is possible to set the frequency and number of output pulses for each pulse output by the special internal outputs for
individual setting, regardless of whether the CPU is operating or stopped. Turn on the corresponding bit in the following
special internal outputs when only the pulse frequency or number of output pulses should be changed.
If the total of frequencies exceeds 5 kHz as a result of performing individual setting of pulse outputs for pulse outputs
that are working normally, the bit for the error display special internal output that corresponds to the changed pulse output
will turn on, and that pulse output will work at the frequency before the setting change. (The value set in the special
internal output also returns to the previous value before the setting was made.)
15 2 1 0
WRF058: Pulse output 1
Not used a b
WRF059: Pulse output 2
Not used a b
WRF05A: Pulse output 3
Not used a b
WRF05B: Pulse output 4
Not used a b
Figure 8.37 Special internal outputs for setting individual pulse outputs
Bit Description
a Number of output pulse change request
b Output pulse frequency change request