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COMPONENT IDENTIFICATION
■ FRONT VIEW
RUN LED
1
2
3
4
5
ERR LED
6
7
8
11
12
13
14
15
16
17
18
19
20
■ STATUS INDICATOR LED
RUN indicator: Bi-color (red/green) LED;
Red when the bus A operates normally;
Green when the bus B operates normally;
Amber when both buses operate normally.
ERR indicator: Bi-color (red/green) LED;
Red with the excitation abnormality;
Green in normal operating conditions.
Input status indicator: Red LED;
1 to 8:
Turns on with the inputs supplied.
9 to 15:
Unused*
16:
Turns on with the reset input supplied.
*The LEDs are connected with terminals via internal cir-
cuit. Therefore, the LED turns on, if the corresponding ter-
minal is connected to terminal 10 or 20. However, it does
not affect the operation.
BIT ALLOCATION OF THE FIRST WORD FROM HOST PC/PLC
The bits indicating the channels to reset counter are allocated in the first word from host PC/PLC.
When these bits are changed from 0 to 1, the counter is reset. When it is confirmed that the counter is reset, return to 0.
Notice that if the bit remains at 1, the next reset will not work.
15
9
10
Status Indicator LED
11
12
13
14
15
16
1
2
3
4
5
6
7
8
9
10
0
■ SIDE VIEW
Set the Count Reset SW to OFF to start counting.
Count reset CH.1
Count reset CH.2
Count reset CH.3
Count reset CH.4
Count reset CH.8
Unused
Unused
R3-PA8
Functions
SW3
4
Count
3
Reset Input
2
1
Count
Reset
ON
EM-8457
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