What is the signification of the I/O words of a PCD2/3.W525 module?

FAQ #101552

When configuring a W525 module using the Device Configurator or the Profi-S-I/O (or Profibus DP) Network Configurator, the PCD2/3.W525 does need two registers for the analogue outputs and 8 registers for the analogue inputs.

 

The significations of the registers are the following:

Output registers: 

Register

Bit 31..16

Bit 15..0

n

 

Value CH0 Output

n+1

 

Value CH1 Output


Description of the output registers:

Value CH0..1 (Register n, n+1)
This registers (Bit 0 to 15) does contain the analogue output value of the corresponding analogue output. It's a 12 Bit value.

Input registers:

Register

Bit 31..16

Bit 15..0

n

 

Value CH0 Input

n+1

 

Value CH1 Input

n+2

 

Value CH2 Input

n+3

 

Value CH3 Input

n+4

 

Load Current/Voltage

n+5

 

Status Module

n+6

 

Status Input

n+7

 

Status Output

Description of the input registers:

Value CH0..CH3 (Register n...n+3)
This registers (Bit 0 to 15) does contain the analogue input value of the corresponding analogue input. It's a 14 Bit value.

Load_Current / Load_Voltage (Register n+4)
On this register (Bit 0 to 15) the actual current or voltage value is displayed.

  • current in [μA] (0..20'000)
  • voltage in [mV] (0..10'000) 

Status Module (Register n+5)
This register (Bit 0 to 15) does contain the actual status of the module

Table module status:

Bit

Description

15:14

Reserved

13

Error on the output channel CH1

12

Error on the output channel CH0

11

Error on the input channel CH3

10

Error on the input channel CH2

9

Error on the input channel CH1

8

Error on the input channel CH0

7:5

Reserved

4

Communication: Illegal Command.
Is set to 1 if the module receive a not know instruction.

3

Communication: packet too long.
Is set to 1 if during the communication a data byte
(CMD/Data = 0) is received although a commando byte should be received (CMD/Data = 1)

2

UExt too low.
The voltage of the external power supply is to low!

1

UExt Fail.

0

No Response.


Status Input (Register n+6)
This register (Bit 0 to 15) does contains the status of the input channels CH0..CH3.
The status of each input channel is displayed on 4 bits.


Status Input:  

Bit

Description

Bit 0..3

CH0 Status

Bit 4..7

CH1 Status

Bit 8..11

CH2 Status

Bit 12..15

CH3 Status


Table input status:

Bit

Description

3

Over Temperature

2

Not Calibrated

1

Over Range

0

Under Range


Status Output (Register n+7)
This register (Bit 0 to 15) does contain the status of the two output channels CH0 and CH1.
The status of each output channel is displayed on 6 bits.


Status Output:      

Bit

Description

Bit 0..5

CH0 Status (LOW BYTE)

Bit 8..13

CH1 Status (HIGH BYTE)


Table output status:

Bit

Description

CH0

CH1


5

13

Load Resistance too high.
Only for outputs in current mode.
Occurs typically if the output circuit is open

4

12

Load Resistance too low.
Only for outputs in voltage mode.
Occurs typically in case of short circuit

3

11

Over Temperature

2

10

Not Calibrated

1

9

Over Range

0

8

Under Range

Categories

PCD2 / Wxxx

PCD3 / Wxxx

PG5 2.0 / Profibus DP

PG5 2.0 / Profi-S-I/O

PG5 2.0 / Device Configurator

Last update: 31.05.2015 01:18

First release: 12.01.2011 15:30

Views: 10679

The requested software / document is no longer marketed by Saia-Burgess Controls AG and without technical support. It is an older software version which can be operated only on certain now no longer commercially available products.

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