Module orientation – Watlow EZ-ZONE RMC User Manual

Page 13

Watlow EZ-ZONE

RMC Module

•

Chapter 1 Overview

RM Control Module Connected to an OIT Run-

ning Modbus RTU
In this configuration the control module connected

to the OIT is equipped with the Modbus RTU proto-

col (RMCxxxxxxxxx1xx). It is important to note that

Modbus communications takes place between the

OIT and the control it is connected to. The RM back-

plane is always using the Standard Bus protocol. If

it is desired that the OIT communicate to both con-

trol modules, both control modules would need Mod-

bus communications and then pins CC, CA, and CB

would need to be daisy chained together.

Slot C

Control

OIT

Power

Supply

Module Orientation

The picture below represents one of six possible RM

modules. All six will have four slots on the face (slot

A, B, D, and E) and one on the bottom (slot C) not

shown. All of these slots are not always used on all

modules. On the face of the module there is a button

(white circle) under the Zone address (5) that when

pushed and held has the following functions:
1.For any module, push and hold for ~ 2 seconds. The

address will intensify indicating that it can now be

changed. Release and repeatedly press to change

to the desired unique address

2.For the control module, if equipped with the Mod-

bus protocol (RMCxxxxxxxxx1xx) pushing and

holding this button for ~ 6 seconds will cause the

display to reflect P for protocol. Releasing the but-

ton and then pushing it again (within 6 seconds)

the display will toggle between N (Modbus) and S

(Standard Bus). Valid addresses for Modbus and

Standard bus range from 1 -16 (1 - 9, A is 10, B is

11, C is 12, D is 13, E is 14, F is 15, and h is 16).

The Access module is shipped at address J or 17

Module Status (Slot A,

B, D, or E)

Protocol (Standard

Bus - red or Modbus -

green)

Module outputs 1

through 16, all may

or may not be used

depending on module

type