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byte 3: Coil Address High
byte 4: Coils address Low
byte 5: No. of Coils High
byte 6: No. of coils Low
byte 7: Byte Count
byte 8: Force Data
byte 9: CRC_Low
byte 10: CRC_High
The Normal (if no exception) response is the echo of the Query:
byte 1: Serial Link No.
byte 2: Function
byte 3: Coil Address High
byte 4: Coils address Low
byte 5: No. of Coils High
byte 6: No. of coils Low
byte 7: CRC_Low
byte 8: CRC_High
A.11.
Discrete Hardwired Inputs (1x References)
The ASTAT-XT incorporates 16 Discrete Inputs, (bit parameters), from which only 6 are operative. The other 10 are
reserved and were incorporated to enable use of word (16 bits) type parameters. Input # is "1 based". The actual
address is 1 lower than input #. For example input #1 is addressed as 0 (10000). The inputs have the following 1x
references:
Input #
Address
1
0
Stop
2
1
Soft Stop
3
2
Start
4
3
Energy Save *
Slow Speed *
Reset *
5
4
Dual Adjust *
S. Spd Rvrs *
Reset *
6..7
5
Reserved
8
7
External Fault Open Input = no fault (Input reads" 0") (Terminal #19)
9..16
8..15
Reserved
* Programmable inputs.
• Appendix A - MODBUS RTU Protocol
97
($00)
($02)
($00)
($03)
($01)
($07)
($XX)
($XX)
($20)
($0F)
($00)
($02)
($00)
($03)
($XX)
($XX)
ASTAT-XT use Comment
Open Input (Input reads" 0") to Stop.
Close Input (Input reads "1") to enable Start / Run.
Open Input (Input reads"0") to Soft Stop.
Close Input (Input reads"1") to enable Start / Run.
Close Input (Input reads "1") to Start.
Close Input (Input reads "1") to turn On.
Open Input (Input reads "0") to turn Off.
Close Input (Input reads "1") to turn On.
Open Input (Input reads "0") to turn Off.
indicates No Fault Condition.
(Terminal # 4)
(Terminal # 5)
(Terminal # 6)
(Terminal # 7)
(Terminal # 8)
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