IC GEN -XLATE table settings for digital objects

[Product_Support]

Issue

What entries are required in the INPUT_XLATE table for Sigma digital inputs to function correctly?

Product Line

Satchwell BAS & Sigma

Environment

• Sigma gateway.txt
• IC GEN DDE
• IC GEN OPC

Cause

Sigma digital inputs operate using reverse logic, where:

• 100.0 = OFF
• 0.0 = ON

This behavior must be accurately reflected in the gateway.txt file's XLATE table for proper operation.

Resolution

To correctly map digital input and output objects in the IC GEN gateway.txt file, configure the XLATE tables as follows:

1. Input XLATE Table (Mapping to Digital Input Objects)

   [INPUT_XLATE]
   count=2
   Item0=1 / 0.0       ; DDE input of 1 = DI ON
   Item1=0 / 100.0     ; DDE input of 0 = DI OFF

2. Output XLATE Table (Mapping from Digital Output Objects)

   [OUTPUT_XLATE]
   count=2
   Item0=0.0 / 0       ; DO OFF = DDE output of 0
   Item1=100.0 / 1     ; DO ON = DDE output of 1