Saia-Burgess Controls AG
Manual for PCD2.W745 and PCD3.W745
│
Document 26-796 E
NG06 │ 2018-10-12
Programming
Programming with series xx7
3
3-9
Overview
The module needs in the peripheral input range 4 bytes for status and 4 words for
values (together 12 bytes). Each channel uses 1 byte for status and 1 word for the
temperature value. If a user tries to access to the grey fields in the below table a I/O
access error (OB122) occurs.
The following table shows the peripheral range:
Offset
L PEB
L PEW
PED
0
Status CH0
1
Status CH1
2
Status CH2
3
Status CH3
4
Value CH0
5
6
Value CH1
7
8
Value CH2
9
10
Value CH4
11
Description of the peripheral inputs
Value CH0...3: (PEW offset 4, 6, 8 ,10)
These peripheral input words contain the temperature values of each channel. The
temperature can be read in 1/10 unit (unit depending on the module configuration in
Kelvin, °C or °F). The value occurs as two’s complement with sign.
If the address range is not within the process image the status has to be read first
before the temperature value can be read. If bit 6 of the status is set a new value will
be read, otherwise the last one is read.
