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
3-10
CHx status / diagnostic (PEB offset 0...3)
With this peripheral input byte the status of each temperature measurement can be
read. If the address range is not within the process image the status has to be read
first before the temperature value can be read in order to have an updated value. If
the address range is within the process image first the status byte and then the tem
-
perature value is read automatically from the module.
Bit
Description
0
Over range: The measured value is over the allowed range of the sen
-
sor. The read value in the appropriate PEW (CH0…3) is set to 0xFFFF.
1
Under range: The measured value is under the allowed range of the
sensor. The read value in the appropriate PEW (CH0…3) is set to 0..
2
Reserved (0)
3
Sensor fail: At least one wire connected to this channel is broken. The
read value in the appropriate PEW (CH0…3) is set to the last valid
measured value.
4
Reserved (0)
5
Reserved (0)
6
New value: a new measured value is available. This bit is set to 0 when
reading the status byte.
*)
7
Reserved (0)
*)
If the address range is within the process image this bit is always set to 0, i.e. it
is not relevant. This is also valid using the module with Profibus-DP RIO.
The diagnostic bits stay to 1 until the error does not exist any more.
