Watlow EZwarePlus Programming - Manual (Page 27)

EZwarePlus Programming Manual 19
Chapter 3 – Connect the HMI to the PLC or Controller
The HMI5000P/L family of HMIs can connect to one, two, or more PLC/controllers. This is accomplished via two 9-pin
D-sub serial communications connectors (Port A and Port B) and one Ethernet port. Each PLC/Controller has its own
wiring requirements. Maple Systems offers HMI-to-PLC/Controller communication cables for most PLC/Controllers
that are built to any length and tested for high reliability. The HMI5000P/L family has three software controlled
communications ports (COM1, COM3, and CAN bus) located on two physical connectors, designated as Port A and
Port B.
 The L and HD series do not support CANbus.
Figure 1: COM Ports – Bottom View
Each software controlled communications port can only be selected for one communication type. Once a
communication type is selected for one of these software controlled ports, that port cannot be used for another
communication type. Each of these communication ports has between one and three communication types. COM1
can be RS232, RS485 4-Wire, or RS485 2-Wire. COM3 is either RS232 or RS485 2-Wire. The CAN bus port is strictly for
CAN bus connections using the CANopen protocol. COM1 cables are readily available for purchase from Maple
Systems. COM3 and CAN bus cables are custom-made according to wiring diagrams that can be found on Maple
Systems' web site. Connecting multiple PLCs and controllers may require a splitter.
1010-1015, Rev. 03