
Operation
RS 485 Port Configuration (Communication Board Option)
RS 485 Port Configuration (Communication Board Option)
COMM A and B ports
UMC controllers equipped with the optional communications board feature two RS 485 serial communications ports (COMM A and COMM B) on the CPU module. See Figure 31 for location of the port connectors. See Wiring Communications links, Page(36) for more details on the port wiring. The controller firmware supports Modbus RTU protocol for the ports.
The COMM A and COMM B ports must be set up so that the controller can communicate when connected to a communication link. Set up is accomplished through the operator interface or the user utility software program. The Communications screen in the operator interface for COMM A is used to enable the port, set the device (station) address of the controller and set the baud rate. The COMM B screen is used to set the baud rate. See UMC800 Operator Interface User Guide for details on communications port setup. See UMC800 User Utility User’s Guide and the
COMM port status
COMM A status can be checked through the COMMUNICATIONS menu item on the operator interface. COMM B status can be monitored with the User Utility. Slave device statuses can be viewed after loading a configuration into User Utility via upload or floppy disk. Slave devices must first be enabled through the operator interface COMMUNICATIONS menu item or the User Utility.
CPU Module with Optional Communications Board
Re plac e ba ttery wit h Ta di ra n TL510 1/S | RUN |
on ly. Us e of ano ther ba ttery ma y pre se nt a risk of fire or ex pl osi on . See use rs g uide f or i ns tr uct ions . |
BAT
DISPL AY
_
100 - 24 0 V ~
50 / 6 0 Hz
100 VA MAX.
COMM A |
|
Port | A |
COMM B | COM M |
| |
Port | B |
| COMM |
F 3,15 A T
250V
L1
L2 / N
COMM A and B shown with
Figure 31 COMM A and B ports on CPU module
Release F | UMC800 Controller Installation and User Guide | 61 |
4/01 |
|
|