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FnIO MODBUS Adapter NA-9171, NA-9173
FnIO S-Series
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6.3.2.
Adapter Watchdog Time, other Time Special Register (0x1020, 4128)
A watchdog timer can be configured for timeout periods up to 65535(1unit=100msec). The Watchdog timer will
timeout (timer decreased, reached 0) if MODBUS operation to the slave node does not occur over the configured
watchdog value, then the slave adapter forces that slot output value is automatically set to user-configured fault
actions and values.
Address
Access
Type, Size
Description
0x1020(4128)
Read/Write 1 word
Watchdog time value 16bit unsigned.
The time value is represented by multiples of 100msec.
The default value is 50 (50*100msec=5sec).
A changing of watchdog time value resets watchdog error.
0x1021(4129)
Read
1 word
Watchdog time remain value
This value decreases every 100msec
0x1022(4130)
Read
1 word
Watchdog error counter, it is cleared by writing address
0x1020
0x1023(4131)
Read/Write 1 word
Enable/disable auto recovery Watchdog error when receiving
new frame.
0: Disable, 1: Enable (default).
Its value is stored in EEPROM.
0x1024(4132)
Read/Write 1 word
Transmission response delay time. The value can be set 16bit
unsigned (1msec unit).
The default value is 0 (no delay).
0x1025(4133)
Read/Write 1 word
Valid byte-byte time gap in ASCII mode. (1msec unit)
In ASCII mode byte-byte time gap is over setting value during
receiving frame, this frame will be cancelled (dropped).
0x1028(4136)
Read
2 words
IO update time, main loop time. (100usec unit)