51198947-100 Gently ease the unit/baseplate sideways in order to release the contacts of the unit. 6. Turn the locking device anti-clockwise to the OPEN position (1) and ease the unit baseplate outward and upward at the base. Lift the unit to remove it from the DIN-rail. 7. Mount the new unit (which already has the correct firmware installed). See Mounting AC 800M Units onto DIN-Rail on page 65. Fit the unit to BC810 CEX-Bus. 8. Reconnect the Power Supply Socket to the new processor unit. 9. Reconnect the optical ModuleBus and the RCU Link Cable. 10. Reconnect the Control Network cables. 11. Press the INIT push button on the replaced processor unit. 12. Observe the startup procedure and make sure that Dual mode is reached, that is, the Dual LED is lit on both processor units. The unit baseplates are easily disconnected from each other by gently prying them apart with a blade screwdriver (see Figure 23 on page 74). The F(ault) LED of the new processor unit is temporarily lit when the power supply is connected. This is not an indication of fault. Pressing the INIT button initiates the restart that is required to keep the new processor unit in redundant mode. During synchronization, the new processor unit inherits the IP address from the running processor unit. Reuse of CPU modules replaced from redundant configurations within the same control network, might cause control network problems due to the MAC and IP address handling. See MAC and IP Address Handling in Redundant Configuration on page 49. Such reuse should not be fulfilled unless both the replaced module and the module previously acting together with it in redundant configuration are known to be restored from the previous mutual address swap. It is recommended to set up an IP-config session and use the “Restore factory settings” option subsequently followed by reassignment of the IP address or assignment of a new IP address. Exchanging a Defect RCU Link Cables Online Section 5 Maintenance 202 3BSE036351-510 A Exchanging a Defect RCU Link Cables Online In Configuration with BC810 If online change proves to be supported, after the caution above has been considered, and the BC810s are externally supplied with 24V the same steps as in configuration without BC810 can be followed. In Configuration without BC810 To exchange a RCU link cable in a redundant CPU configuration, perform the following steps: 1. Switch OFF the Power for the backup CPU. (Power on the primary CPU must still be On.) 2. Disconnect the RCU link cable from the backup CPU. 3. Disconnect the RCU link cable from the primary CPU. 4. Attach the new RCU link cable to the primary CPU, note the UPPER orientation on the cable. 5. Attach the other end of RCU link cable to the backup CPU. 6. Switch ON the Power to the backup CPU. Do not replace the RCU link cable online in a previous version than 5.0. The support for online replacement also depends on hardware Product Revision levels. Please consult Release Notes (3BSE021377*) for detailed information. Do not leave the primary CPU with the RCU link cable disconnected for a prolonged time. If a power fail occurs while the cable is disconnected, the primary CPU cannot perform a startup when the power come back. The new cable-ends must be connected to the redundant CPUs (exactly) in the same way as the replaced cable was. Thus, the UPPER mark on the cable-end must be located to the same CPU as before the exchange. Section 5 Maintenance Corrective Maintenance Procedures 3BSE036351-510 A 203 Corrective Maintenance Procedures Changing Fuses – ModuleBus and CEX-Bus To change the TP830 internal ModuleBus and CEX-Bus fuses: 1. Using a blade screwdriver, release the two spring-loaded captive screws on the PM8xx cover. 2. Carefully remove the processor unit. 3. Identify both the ModuleBus and CEX-Bus fuse-holders to the right on the TP830 Baseplate. 4. Using a blade screwdriver, carefully unscrew the fuse-holder containing the defective fuse. Remove the fuse. 5. Insert a new fuse and replace the fuse holder. 6. Replace the processor unit and tighten the cover screws. 7. Check that the relevant LED lights up. This topic does not apply to PM891, which does not contain internal fuses. • Upper Fuse-holder – ModuleBus – fuse 2 AF • Lower Fuse-holder – CEX-Bus – fuse 3.15 AF • Upper Fuse-holder – ModuleBus – fuse 2 AF • Lower Fuse-holder – CEX-Bus – fuse 3.15 AF |
