The 1746-BTM module is compatible with any SLC processor that 

supports M0/M1 files, such as the SLC 5/05, SLC 5/04, SLC 5/03, and 

SLC 5/02 controllers.

Vocabulary

In this manual, we refer to:

• the barrel temperature control module as the “1746-BTM 

module,” the “BTM module,” or as “the module”

• the programmable controller as the “SLC processor”, or “the processor”

• a thermocouple as a “TC”

• a time-proportioned output as “TPO”

• the tuning-assisted processes as “TAP”

• proportional-integral-derivative as “PID”

• cold-junction compensation as “CJC”

Current CV

Your ladder logic should read the numeric value (current CV), scale it, 

and send it to an analog output module to generate the control signal 

to an analog temperature control actuator. If using the sample 

program look for current CVs in N10:208–211 for loops 1–4. 

TPO

The module returns the heat TPO (bit 6) and cool TPO (bit 7) in input 

image table words 8–11 for loops 1–4. The sample program sends 

TPO signals to a digital output module to generate the control signal 

to a digital temperature control actuator.