Software Features

The module provides the following software features.

• BASIC programming with the Intel BASIC-52 language and enhancements

• SLC 500 backplane data read and write support including image 

table transfers and M0 and M1 file transfers

• Execution of programs from memory modules

• String manipulation support

• DH485 network support

• DF1 protocol support

• Full set of trigonometric function instructions

• Floating point calculations and conversion

• Extensive call libraries

Module Communication Ports

There are three communication ports on the front of the module. The 

location, name, and pin numbers of these ports are listed on the 

inside of the module door. 

They are:

• PRT1 – Used to interface the module with user devices. This port 

is a serial port that accommodates RS-232/423, RS-422, and 

RS-485 communication modes. Port PRT1 is capable of operating 

full-duplex at 300, 600, 1200, 2400, 4800, 9600, and 19200 Kbps. 

The default settings are 1200 Kbps, RS-232/423 communications.

• PRT2 – Used to interface the module with user devices or a 

modem using DF1 protocol. This port is a serial port that 

accommodates RS-232/423, RS-422, and RS-485 communication 

modes. Port PRT2 is capable of operating full-duplex at 300, 600, 

1200, 2400, 4800, 9600, and 19200 Kbps.

• DH485 – Used to interface the module with the DH485 network. 

This port is not isolated and cannot directly drive the DH485 network. 

You must use a 1747-AIC link coupler to link port DH485 with the DH485 network.