Thyracont VSH88D, Operating Instructions Manual

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vsh-de-130326
4.9 Mode Sensor Transition
By default the VSH performs a continuous transition between Pirani and hot
cathode range whereupon an assimilation of the sensor signals is carried out.
In order to adapt the performance of the transducer to the requirements of the
vacuum process you can configure the parameter "mode sensor transition"
according to the following:
"0":
no transition, but direct switch-over between Pirani and hot cathode at
1.0 x10
-3
mbar
"1": continuous transition in the range 1.0 – 2.0x10
-3
mbar (standard)
Address Code Data cks CR
Address:
3 Bytes, decimal; address space RS485: 001 – 999
Code: "W" for reading, "w" for writing the parameter
Data: 6 Bytes; "000001" transition, "000000" direct switch-over
cks: 1 Byte, checksum, defined as sum over all Bytes of the fields
address, code and data, modulo 64 plus 64.
CR: Carriage Return (0Dh, 13d)
Example (for address-switch in position "1"):
Action Telegram to
transducer Answer telegram
from transducer
Set mode sensor transition
to continuous transition "001w000001i
C
R
" "001w000001i
C
R
"
Read mode sensor transition
"001Wh
C
R
" "001W000001I
C
R
"
( transition)
Please find further information about the Thyracont communication protocol in
chapter 4.2.