Panasonic FP-M Hardware Manual page 163

Construction of DT9121
The status of the high-speed counter board can be monitored in this area.
15 12 11
Bit position • •
Data
0 0 0
*1. Output disable input:
This input disables external output even if the high-speed counter is set to the output enable mode by DT9120.
While this input is turned ON, the output of the high-speed counter board is not changed even if the elapsed value
becomes equal to the target.
*2. Error codes
A BCD error is detected only when data for the high-speed
counter board is set to BCD operation using F0 (MV) and bit
position 7 of DT9120.
8 7 4 3 0
• • • • • •
CH1 Flag bit for "reset enable input
CH1 Flag bit for "output disable input
CH0 This flag turns ON when
"Target 0 = elapsed value"
CH0 This flag turns ON when
"Target 1 = elapsed value"
CH1 This flag turns ON when
"Target 0 = elapsed value"
CH1 This flag turns ON when
"Target 1 = elapsed value"
Error code *2
Error flag
(1: an error occurs)
CH0 Flag bit for "reset enable input
(RST.E0 terminal)"
[1: ON (reset enabled)]
CH0 Flag bit for "output disable input
(O.INH0 terminal)" *1
0: OFF (output enabled)
1: ON (output disabled)
(RST.E1 terminal)"
[1: ON (reset enabled)]
(O.INH1 terminal)" *1
0: OFF (output enabled)
1: ON (output disabled)
Bit position
11 10
0 0
0 0
0 1
1 0
7-5. High-speed Counter Board
Description
9 8
0 1 BCD error
1 0 CH0 overflow/underflow
0 0 CH1 overflow/underflow
0 0 Watchdog timer error
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