GE IC698PSA100 RX7i PLC Power Supply, 85 to 264 VAC at 47 to 63 Hz Input, 100 Watt output
This chapter explains the Logicmaster 90–70 configuration steps for a Bus Controller
and its bus devices. If the configuration software being used is earlier than release 4.01,
some of the features described here will not be available.
Configuration Overview
A Bus Controller and the devices on its bus must be configured in two basic, different
procedures.
1. The Bus Controller and the devices on its bus must be configured as part of the Se ries 90–70 PLC system using the Logicmaster 90–70 software.
2. The devices on the bus must also be configured separately. This includes:
A. Configuring I/O blocks with a Hand–held Monitor and/or Write Configuration
COMREQs.
B. Configuring Remote Drops using Logicmaster 90–70.
C. Configuring redundant Bus Controllers using Logicmaster 90–70.
This book only covers Logicmaster configuration of Bus Controllers.
For Additional Information, Also See:
Chapter 5, which describes Read Configuration and Write Configuration COMREQs.
Chapter 6, which describes data monitoring, distributed control, and redundant control
systems.
The Genius Analog and Discrete Blocks Manual, which includes instructions for configuring
most I/O blocks.
The Genius I/O System and Communications Manual, which details the data that can be
transferred using Read Configuration and Write Configuration COMREQs.
The Logicmaster 90–70 Software User’s Manual, which covers configuration of the entire
PLC.
The Series 90–70 Remote I/O Scanner User’s Manual, which covers configuration of Re mote Drops.

The default entries can be used as is, or changed. Until a valid configuration is stored to the
PLC CPU, the Bus Controller will not operate on the Bus, and its Channel OK LED will not light.
Ordinarily, the Device Number (Bus Address) assigned to a Bus Controller is 31. Any number from 0 to 31 can be used; each must be unique on
that Genius bus. For redundancy applications, only 30 and 31 should be
used.
All devices on a bus must use the same baud rate: 153.6 Kbaud standard,
153.6 Kbaud extended, 76.8 Kbaud, or 38.4 Kbaud. Selection of a baud
rate depends on the application, as explained in the Genius I/O System
User’s Manual. Usually, the bus length determines the baud rate. The
entry made here establishes the baud rate for the Bus Controller only. If
the default baud rate (153.6 Kbaud standard) will not be used, the baud
rate of other devices on the bus must also be changed. Typically, this is
done using a Hand–held Monitor.
This entry determines how the Bus Controller will respond to errors on
the bus. If the Bus Controller should drop off the bus when a specified
number of errors occur within a 10–second period, enter that number
of errors here. If the Bus Controller should remain on the bus when
errors occur and try to maintain communications, enter 0 here.
Caution
If the bus includes a Bus Switching Module or another device that controls bus switching, the Error Rate MUST be set
to 0. Otherwise, the Bus Controller may drop off the bus
when the BSM is switching a block to the bus.
This entry can be used to verify that references already configured for
devices on the Genius bus match the status references assigned to the
same devices in Logicmaster 90. If ENABLED, references are checked for
all configured devices except PowerTRAC blocks or “GENA”–based bus
devices. This feature will not detect or configure an unconfigured device,
or correct references that do not match.