Hydromatic II Chiller Operation Manual

Table Of Contents

Page 30

Appendix 2: Organizing IDs in the CAN system

Controls are addressed on the CAN bus by assigning group ID and unit ID

numbers to each control in the system.

System example:

Control Unit Group

Area 1, Air handler 1 1

Area 2, Air handler 1 2 2

Area 2, Air handler 2 3 3

Area 3, DX system 4 4

Ice maker 5 5

Area 4 Air handler 1 13 13

Area 4 Air handler 2 14 13

Area 4 Air handler 3 15 13

Hydromatic 1 131 131 Master (Slave 1)

Hydromatic 2 132 131 Slave 2

Hydromatic 3 133 131 Slave 3

Hydromatic 4 134 131 Slave 4

Pump relay 139 131 System pump for Hydromatic

Rule 1: All controls must have unique unit IDs.

Rule 2: All controls that independently service an area must have the same group

ID as their unit ID. See units 1 to 5 above.

Rule 3: Controls that service a common area must have the same group ID. See

units 13, 14, and 15 above.

Rule 4: Every control in a Hydromatic system must have the same group ID.

Rule 5: No Hydromatic master must be assigned an ID within 9 ID’s of another

Hydromatic master.

Rule 6: The Hydromatic master must have the same unit ID and group ID value.

Rule 7: Each Hydromatic slave in the system must be sequentially numbered

above its group id. See 131 to 134 above.

Note: Controls are identified to connected computers by serial number. Additionally

some controls require entering the serial number during configuration. When installing

controls, the serial numbers of each control and its location should be recorded along

with the unit ID assigned to the control.