Replacing A Defective Redundancy Connection With S7-1500H; Replacing Defective Synchronization Module With S7-1500H - Siemens Simatic S7-1500R System Manual
Redundant system
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11.1.3.2
Replacing a defective redundancy connection with S7-1500H
Initial situation
One redundancy connection (fiber-optic cable) has been interrupted. Display shows: Single
pairing with information on interface and port.
The S7-1500H redundant system is in the RUN-Redundant system state.
Procedure: Replacing the redundancy connection
Proceed as follows to replace a defective redundancy connection:
1. Check the X3/X4 LEDs. You can pinpoint the defective redundancy connection on the
basis of which LEDs are off.
2. Check the redundancy connection that you have located with the LEDs.
3. If the redundancy connection is defective, replace the fiber-optic cable.
Result
The defective redundancy connection has been replaced. The X3/X4 LEDs flicker
yellow/green.
11.1.3.3
Replacing defective synchronization module with S7-1500H
Initial situation
A synchronization module has failed.
The redundant S7-1500H is in the RUN-Redundant system state.
Procedure: Replacing the synchronization module
Proceed as follows to replace a defective synchronization module:
1. Check the X3/X4 LEDs on the primary and backup CPU. Locate the defective
synchronization module on the basis of which LEDs are off.
2. Replace the defective synchronization module. Connect the redundancy connection
(fiber-optic cable).
3. If the X3/X4 LEDs remain off, replace the synchronization module on the other CPU.
Result
The defective synchronization module has been replaced. The X3/X4 LEDs flicker
yellow/green.
S7-1500R/H redundant system
System Manual, 10/2018, A5E41814787-AA
11.1 Replacing components of the S7-1500R/H redundant system
Maintenance
263
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