In general, if incorrect readings appear on a new install then checking for proper installation and
configuration would typically prevail as a cause versus an existing working module where a hardware failure of some type (channel or module) would be more likely the cause.
Also, if multiple channels are experiencing these symptoms, disconnect all thermocouples
except one. This can help determine if it is external hardware or the module itself is the cause.
Before attempting to troubleshoot these symptoms, a great deal of work can be saved by first,
visually inspecting the module, and second, applying a thermocouple emulator directly to the module input in question.
Make sure that the module is powered and communicating based on the status indicators.
Red or flashing green status indicators signify a problem.
Make sure that the wiring is intact and correct and the cold junction sensors (CJS) are installed correctly for the correct wiring arm,
terminal base, or removable terminal block. If all looks correct, then remove the thermocouple from the channel in question and apply the emulator.
1756 ControlLogix Controllers
The ControlLogix® controller provides a scalable controller solution that is capable of addressing many I/O points. You
can place the ControlLogix controller into any slot of a ControlLogix I/O chassis, and install multiple controllers in the
same chassis.
ControlLogix controllers can monitor and control I/O across the ControlLogix backplane, and over network links. The
ControlLogix 5580 controllers have an embedded Ethernet port for a direct connection to Ethernet-enabled devices and
networks, and also support communication interface modules in the local chassis. To provide communication for
ControlLogix 5570 or ControlLogix 5560 controllers, install the appropriate communication interface module into the
local chassis.
ControlLogix 5580 and ControlLogix 5570 controllers are available with a conformal coating. A conformal coating
provides a layer of protection against contaminants and humidity to help protect the assembly and extend product life in
harsh, corrosive environments. Products with a conformal coating have a ‘K’ suffix at the end of the catalog number.
You may also need the following related products:
A-B 1756-M02AS Module Rockwell Servo Control |
A-B 1756-M03SE Module Rockwell Servo Control |
A-B 1756-M08SE Module Rockwell Servo Control |
A-B 1756-M08SEG Module Rockwell Servo Control |
A-B 1756-M16SE Module Rockwell 1756 16 Axis Servo Control |
A-B 1756-OA16 module Rockwell ControlLogix 16 digital output |
A-B 1756-OA16I module Rockwell ControlLogix 16 digital output |
A-B 1756-OA8 module Rockwell ControlLogix 8 digital output |
A-B 1756-OA8D module Rockwell ControlLogix 8 digital output |
A-B 1756-OA8E module Rockwell ControlLogix 8 digital output |
A-B 1756-OB16D module Rockwell ControlLogix 16 digital output |
A-B 1756-OB16E module Rockwell ControlLogix 16 digital output |
A-B 1756-OB16I module Rockwell ControlLogix 16 digital output |
A-B 1756-OB16IEF module Rockwell ControlLogix 16-point digital quantity |
A-B 1756-OB16IS module Rockwell ControlLogix 16 digital output |
A-B 1756-OB32 module Rockwell ControlLogix 32 digital output |
A-B 1756-OB8 module Rockwell ControlLogix 8 digital output |
A-B 1756-OB8EI module Rockwell ControlLogix 8 digital output |
A-B 1756-OB8I module Rockwell ControlLogix 8 digital output |
A-B 1756-OC8 module Rockwell ControlLogix 8 digital output |
A-B 1756-OF4 module Rockwell ControlLogix 4 analog |
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