Jetter JC-120MC, User Manual

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416 Jetter AG
10 Programming
Dummy modules on the JX3 system bus
A dummy module is a module on the JX3 system bus that actually does not
exist. When assigning I/O module numbers, the controller JC-120MC and the
bus node JX3-BN-xxx treat dummy modules as if they were existing modules.
Dummy modules allow the user to insert a nonexistent module between
existing modules.
The value contained in the register for dummy module configuration is
non-volatile. Any changes become effective only after the module has been
re-initialized.
Register Description
R 100002023
I/O dummy modules

JX3 modules
Step Action
1 Modify the dummy module configuration within the controller via
R 100002023.
2 Switch the controller off.
3
Then, switch the controller on.
Result:
The controller or bus node has initialized the JX3 system bus taking into
account the configured dummy modules. Information from the dummy
modules can be retrieved via module array.
Dummy modules
Module register properties
Values 1 ... 65535 (bit-coded)
Bit 0 -> module 2
Bit 1 -> module 3
...
Bit 15 -> module 17
Bit = 1: Module may exist
Bit = 0: Dummy module
Value after reset 65535 (all modules may exist)
Dummy modules
Registers - Overview
Allowed dummy
modules
Configuring dummy
modules
R 100002023