Exchanging Data - Omron DEVICENET#05-2003 Operation Manual

Functions
1-2-2

Exchanging Data

Initialization
10
Indicators
Unit
Communications TS Indicator:
Unit Lit green
I/O Units TS indicator:
Lit green
U.ERR indica-
tor: Not lit
PWR indicator:
Lit green
For details, refer to page 199, Troubleshooting via Indicators.
Checking the I/O Unit Interface Status
The first two words of the CPU Unit allocation input area are always allocated
to the status of the I/O Unit interface via the DeviceNet.
DeviceNet Master Unit
Communica-
tions Unit
When the Communications Unit is started, it automatically recognizes the
configuration of the I/O Units and registers this status as the normal configu-
ration (in RAM memory). At the same time, addresses 0 to 7 are allocated to
the I/O Units in ascending order from the I/O Unit closest to the Communica-
tions Unit. These processes are performed each time the power is turned ON.
DeviceNet
Network TS indicator
Communica-
I/O Unit
tions Unit
Normal
TS indicator
I/O Unit interface error:
Special I/O Unit error:
Maximum power supply
overload to I/O Units:
TS indicator
I/O Unit interface error:
U.ERR indicator
Special I/O Unit error:
PWR indicator
No internal power supply: Not lit
Output Input
area area
DeviceNet Network
I/O Unit I/O Unit
Section 1-2
I/O Unit
Error
Lit red
Flashing green
Not lit
Lit red
Lit red
Status, two words
0 wd
I/O Unit connection information
Error slaves Registered slaves
+1 wd
For details, see page 15.