beautypg.com

B-13 – Siemens Simatic S7-400 User Manual

Page 587

background image

Diagnostic Data of the Signal Modules

B-13

S7-400, M7-400 Programmable Controllers Module Specifications
A5E00069467-07

Bytes 4 to 8 of the SM 422; DO 16

20-120 VAC/2 A

Byte 4

7 6

0

5 4 3 2 1

Byte 5

7

0

Channel type B#16#72: digital output

Number of diagnostics bits that the module
outputs per channel: 8 bits long

Byte 6

7

0

Number of channels of the same
type in one module: 16 channels

0

Byte 7

7 6

0

Channel error, channel 0

Channel error, channel 1

Channel error, channel 6

Channel error, channel 7

5 4 3 2 1

...

Byte 8

7 6

0

Channel error, channel 14

Channel error, channel 15

5 4 3 2 1

...

Channel error, channel 8

Channel error, channel 9

Figure B-15

Bytes 4 to 8 of the Diagnostic Data of the SM 422; DO 16 x 20-120 VAC/2 A

Bytes 9 to 24 of the SM 422; DO 16

20-120 VAC/2 A

Data record 1 with bytes 9 to 24 contains the channel-specific diagnostic data. The
figure below shows the assignment of the diagnostic byte for a channel of the
module.

7 6

0

Fuse blown

5 4 3 2 1

0

Configuring/parameter assignment error

0

0

0 0 0

Figure B-16

Diagnostic Byte for a Channel of the SM 422; DO 16 x 20-120 VAC/2 A

This manual is related to the following products: