dl-breadcrumbs__homedl-breadcrumb-item__separatorHardware descriptionsdl-breadcrumb-item__separatorDevice specificationsdl-breadcrumb-item__separatorI/O modulesdl-breadcrumb-item__separator...dl-breadcrumb-item__separatorAnalog I/O modulesdl-breadcrumb-item__separatorS500 and S500-XCdl-breadcrumb-item__separatorAC522 - Analog input/output moduledl-breadcrumb-item__separatorDiagnosis
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Table 197: Possible diagnosis of I/O channels

Output range

Condition

Output value in the PLC underflow

Output value in the PLC overflow

0 mA ... 20 mA

Error identifier = 7

Error identifier = 4

4 mA ... 20 mA

-10 V ... +10 V

Input range

Condition

Short circuit

Wire break

Input value underflow

Input value overflow

0 mA ... 20 mA

no diagnosis possible

no diagnosis possible

no diagnosis possible

Error identifier = 48

4 mA ... 20 mA

Error identifier = 7

Error identifier = 7

Error identifier = 7

Error identifier = 48

-10 V ... +10 V

no diagnosis possible

Error identifier = 48

Error identifier = 7

Error identifier = 48
Table 198: Content of diagnosis messages

E1 ... E4

d1

d2

d3

d4

Identifier

000 ... 063

AC500 display

<− Display in

Class

Comp

Dev

Mod

Ch

Err

PS501 PLC browser

Byte 6

Bit 6 ... 7

-

Byte 3

Byte 4

Byte 5

Byte 6

Bit 0 ... 5

FBP diagnosis block

Class

Interface

Device

Module

Channel

Error Identifier

Error message

Remedy

1)

2)

3)

4)

Module error

3

14

1 ... 10

31

31

19

Checksum error in the I/O module

Replace I/O module

11 / 12

ADR

1 ... 10

3

14

1 ... 10

31

31

3

Timeout  in the I/O module

Replace I/O module

11 / 12

ADR

1 ... 10

3

14

1 ... 10

31

31

40

Different hard-/firmware versions in the module

Replace I/O module

11 / 12

ADR

1 ... 10

3

14

1 ... 10

31

31

43

Internal error in the module

Replace I/O module

11 / 12

ADR

1 ... 10

3

14

1 ... 10

31

31

36

Internal data exchange failure

Replace I/O module

11 / 12

ADR

1 ... 10

3

14

1 ... 10

31

31

9

Overflow diagnosis buffer

New start

11 / 12

ADR

1 ... 10

3

14

1 ... 10

31

31

26

Parameter error

Check master

11 / 12

ADR

1 ... 10

3

14

1 ... 10

31

31

11

Process voltage too low

Check process voltage

11 / 12

ADR

1 ... 10

4

14

1 ... 10

31

31

45

Process voltage is switched off (ON −> OFF)

Process voltage ON

11 / 12

ADR

1 ... 10

Channel error

AX521

AX522

4

14

1 ... 10

1

0 ... 3

0 ... 7

48

Analog value overflow or broken wire at an analog input

Check input value or terminal

11 / 12

ADR

1 ... 10

4

14

1 ... 10

1

0...3

0 ... 7

7

Analog value underflow at an analog input

Check input value

11 / 12

ADR

1 ... 10

4

14

1 ... 10

1

0 ... 3

0 ... 7

47

Short circuit at an analog input

Check terminal

11 / 12

ADR

1 ... 10

4

14

1 ... 10

3

4 ... 7

8 ... 15

4

Analog value overflow at an analog output

Check output value

11 / 12

ADR

1 ... 10

4

14

1 ... 10

3

4 ... 7

8 ... 15

7

Analog value underflow at an analog output

Check output value

11 / 12

ADR

1 ... 10

Remarks:

1)

In AC500, the following interface identifier applies:

14 = I/O bus,  11 = COM1 (e.g. CS31 bus), 12 = COM2.

The FBP diagnosis block does not contain this identifier.

2)

With "Device" the following allocation applies:

31 = module itself, 1 ... 10 = expansion module 1 ... 10, ADR = hardware address (e.g. of the DC551)

3)

With "Module" the following allocation applies depending on the master:

Module error: I/O bus or FBP: 31 = module itself; COM1/COM2: 1 ... 10 = expansion 1 ... 10

Channel error: I/O bus or FBP = module type (1 = AI, 3 = AO); COM1/COM2: 1 ... 10 = expansion 1 ... 10

4)

In case of module errors, with channel "31 = Module itself" is output.