Monitoring function
8-1
8. Monitoring function
8.1 Overview
By setting their own addresses for AnyWireBus slave units, when this device sends out an address, a
response from the slave unit with that address allows for disconnection detection and verifies the existence
of the slave unit.
This device stores the addresses of the slave units that are connected at that time via the automatic address
recognition operation (described later) onto the E
2
PROM. This information is stored in memory even if the
power is turned off.
Next, the registered addresses are sent out sequentially, and if there is no response, the "ERR" LED lights
up to indicate a disconnection.
8.2 Automatic address recognition
Storing addresses of the connected slave units onto the E
2
PROM of this device is called "Automatic address
recognition."
Procedure
1 Check that all of the slave units are operating normally.
2 Press and hold the "SET" switch of this device until the "SET" LED (yellow) lights up.
3 The "SET" LED lights up for a while and then turns off when address storage has been completed.
Input/output may not be carried out during automatic address recognition. When carrying out the
automatic address recognition operation, stop execution of any PLC programs or execute in a manner
that does not interfere with the operation of the equipment.
The automatic address recognition operation cannot be carried out if there is an error in the AnyWireBus
D2 such as a short-circuit, after the power is turned on, or for approximately five seconds after resetting.
Do not perform automatic address recognition if a disconnection error is detected during operation.
Doing so will result in the loss of disconnection information.
8.3 Monitoring operation
The registered addresses are sent out sequentially, and if there is no response, the "ALM" LED lights up to
indicate a disconnection.
This error information is retained until the power is turned off or the alarm is reset.
(Refer to the section "LED display.")
CAUTION
!
