29
Checking Operation Section 2-5
Creating and Registering
Scan Lists
Use the following procedure to create, register, and enable the scan lists.
In the following example, n = 1500 + (25 × unit number).
Clearing and Creating Scan Lists
Switch the operating mode switch to PROGRAM mode.
Enable the Master Unit functions. Set the Master Unit function enable switch
(bit 06 of word n) from OFF to ON.
Clear the scan lists. Set the scan list clear switch (bit 01 of word n) from OFF
to ON.
Select the fixed allocation areas 1 to 3. Set the Master Unit's setting switch for
fixed allocation areas 1 to 3 (bit 00 of word n) from OFF to ON.
Enable the scan lists. Set the scan list enable switch (bit 00 of word n) from
OFF to ON.
Switch the operating mode switch to RUN or MONITOR mode.
Checking the Normal Slave Table
Monitor the normal Slave table and check that the corresponding bits are ON.
In the normal Slave table, the corresponding bits will turn ON for the nodes
that are communicating normally.
2-5 Checking Operation
Use the procedures provided here to check that I/O communications are oper-
ating normally.
2-5-1 Indicator Status
I/O communications are operating normally if the MS and NS indicators for all
nodes are lit green, and the 7-segment indicator on the front panel of the Mas-
ter Unit is displaying the node address of the Master Unit as shown in the fol-
lowing diagram (when the Master Unit's node address is 00), and the scan list
is enabled.
2-5-2 Reading and Writing Data
Connect the Peripheral Device for the PLC to the Master Unit, write the Mas-
ter Unit's OUT Area and read the IN Area, and check that the data are the
same in the Slaves.
Refer to the operation manual for the Master Unit for details on OUT Area and
IN Area addresses and how to allocate Slave I/O.
Master Unit 7-segment
Display
OFF: Operating as a Slave.
OFF: Scan list enabled.
Master Unit node address 00
Display switches between error code and error
node address when an error occurs.
To Next Page
Loading...
Need help?
General
