MODBUSA Driver
- Last UpdatedJul 23, 2025
- 1 minute read
|
Driver: Plant SCADA MODBUSA Driver Version: 3.01.xx.xxx Check the Drivers tab on the Products page at the AVEVA Knowledge & Support Center for information about driver updates and new driver pack releases. |
The MODBUSA Driver supports serial communication with many I/O devices (including the Modicon 484, 584, 884, and 984 programmable controllers, and Moore Products IOExpress).
Note: The MODBUS and MODBUSA drivers are closely related. They only differ from each other in the data framing technique used: MODBUS is RTU-based, while MODBUSA is ASCII-based. You should determine which your system requires and make sure you proceed using the appropriate driver.
The maximum request length for the MODBUSA driver is 2000 bits.
Citect SCADA 7.20 or later (or a later version of Plant SCADA) is required to use the MODBUSA Driver.