Omron CJ1W-EIP21 Manual Do Utilizador

Reads CPU Unit information, including operating mode, fatal/non-fatal errors,
and the CPU Unit model.

Note A body format of either 8 bits or 16 bits is possible.

Service code (command, response): 0E Hex is specified for commands.
For responses, the highest bit be ON and 8E Hex will be returned.

Class ID (command): Always C4 (2F).
The class ID depends on the unit version. The class ID is C4 for unit version
2.0, and 2F for unit version 1.0.

Instance ID (command): Always 00 Hex.

Attribute ID (command): The read information is specified by the attribute ID.
The attribute IDs are listed in the following table.

• CPU Operating Mode (when Attribute ID = 64 Hex)

Reads the CPU Unit operating mode.

• CPU Unit Errors (when Attribute ID = 65 Hex)

Reads if there are any fatal or non-fatal errors in the CPU Unit.

• CPU Unit Model (when Attribute ID = 66 Hex)

Reads the CPU Unit model.

Read data (response): The specified information is returned in order.

• CPU Unit operating mode (attribute ID = 64 Hex).

The CPU Unit operating mode is returned in 1-word (2-byte) hexadecimal for-
mat, as follows:

0001 Hex: PROGRAM mode; 0002 Hex: MONITOR mode; 
0004 Hex: RUN mode

00

(*)

0E

C4

(2F)

(*)

Class ID

Attribute ID

Instance ID

Service Code

The class ID depends on the unit version.
Version 2.0: The class ID is C4.
Version 1.0: The class ID is 2F.

8E

Service Code

Attribute Value

64

CPU Unit operating mode

1 word (2 bytes)

65

CPU Unit errors

1 word (2 bytes)

66

CPU Unit model

22 bytes

PROGRAM mode

MONITOR mode

RUN mode