User Manual

Using Datalinks with All Protocols 7-3
20-COMM-H RS-485 HVAC Adapter User Manual
Publication 20COMM-UM009D-EN-P
Using Datalinks with Modbus
This section presents information about using Datalinks with Modbus
networks. For information about using Datalinks for Metasys N2 networks
or Siemens P1 FLN networks, refer to the Using Datalinks with Metasys N2
or Using Datalinks with Siemens P1 FLN
sections in this chapter.
Modbus Datalinks Out: A…D
Table 7.A Modbus Datalinks Out - A1, A2
Modbus
Address Data Direction
Parameter
Description 16-Bit Datalink 32-Bit Datalink
3x0012 Register Input Datalink A1 Out Not used LSW of 32-bit
3x0013
(1)
(1)
A read access to address 3x0013 initiates a refresh of Datalink A1 value before reading.
Register Input Datalink A1 Out 16-bit value MSW of 32-bit
3x0014 Register Input Datalink A2 Out
Not used LSW of 32-bit
3x0015
(2)
(2)
A read access to address 3x0015 initiates a refresh of Datalink A2 value before reading.
Register Input Datalink A2 Out 16-bit value MSW of 32-bit
Table 7.B Modbus Datalinks Out - B1, B2
Modbus
Address Data Direction
Parameter
Description 16-Bit Datalink 32-Bit Datalink
3x0016 Register Input Datalink B1 Out
Not used LSW of 32-bit
3x0017
(1)
(1)
A read access to address 3x0017 initiates a refresh of Datalink B1 value before reading.
Register Input Datalink B1 Out 16-bit value MSW of 32-bit
3x0018 Register Input Datalink B2 Out
Not used LSW of 32-bit
3x0019
(2)
(2)
A read access to address 3x0019 initiates a refresh of Datalink B2 value before reading.
Register Input Datalink B2 Out 16-bit value MSW of 32-bit
Table 7.C Modbus Datalinks Out - C1, C2
Modbus
Address Data Direction
Parameter
Description 16-Bit Datalink 32-Bit Datalink
3x0020 Register Input Datalink C1 Out
Not used LSW of 32-bit
3x0021
(1)
(1)
A read access to address 3x0021 initiates a refresh of Datalink C1 value before reading.
Register Input Datalink C1 Out 16-bit value MSW of 32-bit
3x0022 Register Input Datalink C2 Out
Not used LSW of 32-bit
3x0023
(2)
(2)
A read access to address 3x0023 initiates a refresh of Datalink C2 value before reading.
Register Input Datalink C2 Out 16-bit value MSW of 32-bit
Table 7.D Modbus Datalinks Out - D1, D2
Modbus
Address Data Direction
Parameter
Description 16-Bit Datalink 32-Bit Datalink
3x0024 Register Input Datalink D1 Out
Not used LSW of 32-bit
3x0025
(1)
(1)
A read access to address 3x0025 initiates a refresh of Datalink D1 value before reading.
Register Input Datalink D1 Out 16-bit value MSW of 32-bit
3x0026 Register Input Datalink D2 Out
Not used LSW of 32-bit
3x0027
(2)
(2)
A read access to address 3x0027 initiates a refresh of Datalink D2 value before reading.
Register Input Datalink D2 Out 16-bit value MSW of 32-bit