Hitachi NJI-350B Individual setting of pulse outputs, WRF058 Pulse output, WRF059 Pulse output

Chapter 8 High-speed counter, PWM / Pulse train output and Analogue I/O

(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:

WRF057:

15	14	13	12	11	10	9	8	7	6	5	4	3	2	1	0
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

aNumber of output pulse change request

bOutput pulse frequency change request

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