4.
Maintenance
4.1 Changing the lithium battery
4.2
Testing and troubleshooting
The modules are almost entirely maintenance-free
4.1 Changing the lithium battery
(CPU)
The lithium battery has a life of about
5
years. When the battery
needs replacing, the work should always be carried out by a trained
person employing the following procedure:
1.
Set the mode selector switch to "Stop"
2.
Switch off the 24
V
power supply
3.
Take out the EPROM submodule
4. Disconnect the leads to the CPU
5.
Remove the housing cover
6.
Take out the CPU
7.
Detach the terminal connectors, remove the old battery, fit the
new battery, replace the connectors
8.
Replace the CPU
9.
Replace the housing cover and screw tight
10.
Plug in the power supply cable
11.
Insert the EPROM submodule
12. Switch on the
24
V
power supply
13.
Set the mode selector switch to "Run"
It is essential to use the correct type of battery specified.
4.2 Testing and troubleshooting
The initial power-up sequence of the PC is as follows:
Start
G==)
Switch on
24
V
supply
---
Check program sequence (step by
step)
l-
Check the supply voltage to the
I10 modules
Measure output level, check fuses.
Check voltage level of sensors.
Fig.
29
Testing and troubleshooting
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