Omron CRT1 - 10-2008, Руководство по эксплуатации

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Allocating I/O Data Section 9-2
Alarm Status Area
The Bit Slave Unit’s Alarm Status Area contains the following 16 bits. These
bits indicate serious errors in the Unit.
9-2 Allocating I/O Data
Bit Slave Units are allocated node address areas in units of two points (two
bits).
• Input Units and Output Units
Units with two points are allocated two bits (the node address set for the
Unit).
Units with four points are allocated four bits (the node address set for the
Unit and the next node address area).
• I/O Units
Units are allocated two words (the input and output node address areas).
Two-point Input Units
Four-point Input Units
Two-point Output Units
Bit Content Description
0 Reserved ---
1 EEPROM Data Error Flag
OFF: Normal
ON: Error occurred
Turns ON when there is an error in
the EEPROM data.
2 Reserved ---
3 Reserved ---
4 Reserved ---
5 Reserved ---
6 Reserved ---
7 Reserved ---
8 Reserved ---
9 Reserved ---
10 Power Short-circuit Detection Flag
OFF: Normal
ON: Short-circuit
Turns ON when there is a short in the
power supply connection to the con-
nected devices, including wiring mis-
takes and connected device failure.
11 Load Short-circuit Detection Flag
OFF: Normal
ON: Short-circuit
Turns ON when there is a short in the
load connection, including wiring mis-
takes and connected device failure.
12 Reserved ---
13 Reserved ---
14 Reserved ---
15 Reserved ---
Bit Input Area
1
0
Bit Input Area
3 2 1 0
Bit Output Area
1 0