CEL-MAR ADA-4040PC8, User Manual

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8. IMPLEMENTATION OF THE MODBUS-RTU PROTOCOL
ADA-4040PC8 protocol converter allows connecting controllers with the JCT-ASCII protocol as SLAVE to the RS485 bus MODBUS-
RTU. The length of RS485 bus can be extended (next segments of 1200 m) by the use of ADA-4040 repeaters or ADA-4044H HUBs
RS485.
The MODBUS-RTU protocol used for communication between ADA-4040PC8 converters and SCADA-type system or PLC controller
enable easy integration of JCT controllers in existing automation systems.
8.1. TABLE OF MODBUS-RTU ADDRESSES
8.1.1. REGISTERS OF ACTUAL MEASUREMENTS VALUES OF JCT CONTROLLER, READUOT
BY FUNCTION 04 [3 X - REFERENCES] INPUT REGISTERS
No.
Modbus
registers
Address 3X
Registers
for the
Reading
Range
of data
Range of
Modbus
data
DW divisor
of the value
of the Modbus
register
Parameter
symbol
Parameter description
1. 30121 Read 0.0~2.000 0~2000 1000 PV Cp PV value
2. 30122 Read
0~1500 0~1500 1 PO
O2 mV PV value
3. 30123 Read 0.0~999.9 0~9999 10 PT Temperature PV value
4. 30124 Read 0.0~2.000 0~2000 1000 SV Cp SV value
5. 30125 Read -2.000~2.000 -2000~2000 1000 CC Cp compensation value
6. 30126 Read -100~100 -100~100 1 TC Temperature compensation
7. 30127 Read
-100~100 -100~100 1 MC
O2 mV compensation value
8. 30128 Read 10.00~50.00 1000~5000 100 CO Carbon monoxide value
9. 30129 Read 0~1300 0~1300 1 TA Safety temperature value
10. 30130 Read 0~1300 0~1300 1 TM Enriching gas start temperature
11. 30131 Read 1~1000 1~1000 1 KP Proportion band value
12. 30132 Read 1~1000 1~1000 1 TI Integral factor value
13. 30133 Read 0~1000 0~1000 1 TD Derivative factor value
14. 30134 Read 0.0~2.000 0~2000 1000 EV Event value
15. 30135 Read 0,1 0,1 1 CM Communication mode
16. 30136 Read 0,1 0,1 1 AM Automatic/manual mode
17. 30137 Read 0,1 0,1 1 SR Execution/stop mode
18. 30138 No Read 0~100 0~100 1 AO Carrier control output (out2)
19. 30139 No Read 0,1 0,1 1 ED Prompt of finishing
20. 30140 No Read 0~100 0~100 1 OT Enriching control output (out1)
8.1.2. REGISTERS OF ACTUAL MEASUREMENTS VALUES OF JCT CONTROLLER, READOUT
BY FUNCTION 03 OR SAVED BY FUNCTION 06 [4 X - REFERENCES] HOLDING REGISTERS
No.
Modbus
registers
Address 4X
Registers
for the
Reading/
Writing
Range
of data
Range of
Modbus
data
DW factor
of Modbus
register value
Parameter
symbol
Parameter description
1. 40121 Read 0.0~2.000 0~2000 1000 PV Cp PV value
2. 40122 Read
0~1500 0~1500 1 PO
O2 mV PV value
3. 40123 Read 0.0~999.9 0~9999 10 PT Temperature PV value
4. 40124 R/W 0.0~2.000 0~2000 1000 SV Cp SV value
5. 40125 R/W -2.000~2.000 -2000~2000 1000 CC Cp compensation value
6. 40126 R/W -100~100 -100~100 1 TC Temperature compensation
7. 40127 R/W
-100~100 -100~100 1 MC
O2 mV compensation value
8. 40128 R/W 10.00~50.00 1000~5000 100 CO Carbon monoxide value
9. 40129 R/W 0~1300 0~1300 1 TA Safety temperature value
10. 40130 R/W 0~1300 0~1300 1 TM Enriching gas start temperature
11. 40131 R/W 1~1000 1~1000 1 KP Proportion band value
12. 40132 R/W 1~1000 1~1000 1 TI Integral factor value
13. 40133 R/W 0~1000 0~1000 1 TD Derivative factor value
14. 40134 R/W 0.0~2.000 0~2000 1000 EV Event value
15. 40135 R/W 0,1 0,1 1 CM Communication mode
16. 40136 R/W 0,1 0,1 1 AM Automatic/manual mode
17. 40137 R/W 0,1 0,1 1 SR Execution/stop mode
18. 40138 Write 0~100 0~100 1 AO Carrier control output (out2)
19. 40139 Write 0,1 0,1 1 ED Prompt of finishing
20. 40140 Write 0~100 0~100 1 OT Enriching control output (out1)
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ADA-4040PC8