Omron PRT1-COM Operation Manual page 47

Functions
I/O Unit Connection Information
0 wd
34
1: Error (OR of bits 0 to 4)
1: Refreshing I/O
Bit Flag name
15 Refreshing
I/O
14 Error
4 Multipoint I/O
Unit Error
3 I/O Unit
Power Supply
Overload
2 I/O Unit Inter-
face Error
1 Configuration
Error
0 Special I/O
Unit Error
Note The high and low bytes in this status word are swapped when the transfer mode
is set to Little Endian (see section 2-2-2).
Bit
1: Special I/O Unit Error
1: Configuration Error
1: I/O Unit Interface Error
1: I/O Unit Power Supply Overload
1: I/O Unit Error
Meaning
Refreshing I/O
OR of bits 0 to 4
A multipoint I/O Unit error was
detected.
An overcurrent to an I/O Unit
was detected.
An I/O Unit interface error was
detected.
Data Transfer Error:
In the I/O Unit interface, there
was no response to a com-
mand after the fixed time has
elapsed. Alternatively, the
response expected to be
returned from the end I/O Unit
(terminator) was not received.
Too many I/O Units:
Nine or more I/O Units are
connected.
The I/O configuration was
changed after the Communica-
tion Unit was started.
An error occurred in a Special
I/O Unit.
Section 3-2
Content
1: Communications
between the Commu-
nication Unit and I/O
Units is normal.
0: Communications error
(no response is received
from an I/O Unit)
1: Any one of bits 0 to 4 is
ON
0: Bits 0 to 4 are all OFF
1: Unit error
0: Unit normal
1: Overcurrent detected
0: Normal
1: I/O Unit interface error
0: Normal
1: I/O configuration change
after startup
0: No I/O configuration
change during startup
1: Special I/O Unit error
0: Special I/O Unit normal