1756-CN2R Allen-Bradley

Flashing - when each status indicator is viewed apart from the 

other, each status indicator alternates between the two defined 

states. If both indicators are flashing, they must flash together, 

in phase.

Red 

(cont.)

Stop Service 

Received

A non-redundant module is 

placed into a redundant 

secondary chassis. The 

module was commanded to 

stop functioning by the 

redundancy module 

(RM/SRM).

1. Remove the non-redundant 

module from the redundant 

secondary chassis

2. Replace the non-redundant 

module with the redundant 

module.

This could occur if a 

1756-CN2/R module running 

Boot code is inserted into a 

chassis along with a 

1756-SRM or 1756-RM 

module.

For Redundant Control, the 

1756-CN2 series B module is 

designed to interoperate with a 

1756-RM module. It should not be 

used with a 1756-SRM module.

1. Insert the module into a 

chassis that does not 

contain a 1756-SRM or 

1756-RM module.

2. Update the module’s 

firmware using 

ControlFLASH.

Flashing 

red

Image 

update 

Needed

Boot image running. 

Main firmware image needs 

to be updated.

Update the module’s firmware 

by using the ControlFLASH 

utility.

DUPLICATE 

NODE 

DETECTED

The module’s network address 

is the same as another 

module’s on the link. 

1. Remove power from the 

chassis.

2. Remove the module from 

the chassis.

3. Set the switches to their 

final value. See page 10.

4. Replace the module in the 

chassis.

5. Apply power to the chassis.

Flash in 

progress

Flash update is in progress. No action is required.

If communication to the 

module is lost during a Flash 

Update, this message will 

continue to be displayed even 

though the module will not be 

able to finish the update.

You must remove power from 

the module to recover, and 

then flash again.

2711P-T4W21D8S, 2711P-T4W22D8S, 2711P-T4W21D8S-B, 2711P-T4W22D8S-B, 2711P-T6C21D8S, 2711P-T6C22D8S, 2711P-T6C21D8S-B, 2711P-T6C22D8S-B, 2711P-T7C21D8S, 2711P-T7C22D8S, 2711P-T7C21D8S-B, 2711P-T7C22D8S-B, 2711P-T9W21D8S, 2711P-T9W22D8S, 2711P-T9W21D8S-B, 2711P-T9W22D8S-B, 2711P-T10C21D8S, 2711P-T10C22D8S, 2711P-T10C21D8S-B, 2711P-T10C22D8S-B, 2711P-T12W21D8S, 2711P-T12W22D8S, 2711P-T12W21D8S-B, 2711P-T12W22D8S-B, 2711P-T15C21D8S, 2711P-T15C22D8S, 2711P-T15C21D8S-B, 2711P-T15C22D8S-B

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