CANbus enables inter-PLC data exchange.
When you create a CANbus network, you assign each controller a unique Unit ID number, 1 through 63.
You use these unique ID numbers when you write your network control program. You address operands using the unique ID number. This allows the M90 units to access data from other controllers, using special SIs and SBs in combination with the Unit ID number.
Each controller can read the information contained in SI 200 & SI 201 and SB 200- SB 207 and 16 first Inputs I 0 - I 15 in other units.
To read the information from a controller, the addressing to an SI or SB must be combined with the Unit ID number of the controller being read from.
Example:
We want to add the value in SI 200 in unit #2 with another MI.
CANbus networking is featured in several sample applications, check the application ' 8 PLCs + Alarm' .
Note ♦ |
Unitronics’ CANbus control network is run by a separate isolated power supply that is not part of the network power supply. |
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Note: You can connect up to 63 units in a CANbus network. Each controller can read information from up to 8 other controllers in the network. |
