AS-i operation
AS-i wiring test mode
At a Glance AS-i wiring test mode is used to access the input/output bits of slaves connected to the bus.
Note: The LDS and LAS lists, as well as the adjustment parameters, cannot be accessed.
The wiring test requires the adjustment terminal FTX 117 Adjust to be used.
Note: When accessing slave I/O objects using the FTX 117 Adjust terminal, personnel safety must be maintained while activating accessible objects, in particular slave outputs.
Access conditions
Procedure
This mode can be accessed when the PLC is in a "non-configured" state. This means when: l the PLC does not have an application, or l the AS-i module has not been configured.
The table below describes the procedure for accessing and exiting Wiring test mode from the adjustment terminal.
4
5
6
2
3
Step
1
Action
Set bit %S8 to 0
Set bit %S74 to 1
Set bit %S73 to 1
Comment
Enables wiring test mode.
Saves, if necessary, the current module configuration.
Activates the module in protected mode.
Access I/O via the %I fields for inputs and %Q fields for outputs.
Reset bit %S74 to 0 This bit should normally be set to 0.
Set bit %S8 to 1 Disables wiring test mode
Note: In this mode, all slaves must have a different address to avoid conflict when replying to the module.
TLX DS 37 PL7 xxE
163
