INFICON PSG55x ATM to Medium Vacuum Gauge (Profibus) - Manual (Page 37)

tira56e1 (2010-02) PxG55x.cp
37
This function block describes the functionality of the Pirani measuring part of the
gauge.
The PSG55x does not have a Capacitance Diaphragm Gauge (CDG)
and therefore this function block will be implemented as Instance 1.
The following attributes are supported:
ID Name Structure Data type Bytes Access Store → 
15 AIBlockAdjust Command Record UINT8 2 1_R/W
2_R/W
N 37
16 Block Type ID Simple OSTRING(n) 4 1_R
2_R N 38
19 ProcessValue (PV) Simple *) - 0_XI
1_R
2_R
D 38
20 Status Simple UINT8 1 0_XI
1_R
2_R
D 38
21 Data Type Simple UINT8 1 2_R/W N 38
22 Data Unit Simple UINT16 2 2_R/W N 38
23 Reading Valid Simple Boolean 1 1_R
2_R
D 39
24 Full Scale Simple *) - 1_R
2_R
N 39
39 Safe State Simple UINT8 1 1_R/W
2_R/W
N 39
40 Safe Value Simple *) - 1_R/W
2_R/W
N 39
44 Overrange Simple *) - 1_R
2_R
N 39
45 Underrange Simple *) - 1_R
2_R
N 39
*) According to data type value (ID 21)
Byte Name Structure Data Type Bytes Access Store
0 Adjust
Command
Simple UINT8 1 1_R/W
2_R/W
N
1 Target Value Simple *) 1 1_R/W
2_R/W
N
*) According to data type value (ID 21)
Adjust Command Name Description
0 Zero Adjust Used to calibrate pirani zero pressure value.
A target value has not to been used.
1 Gain Adjust Used to calibrate pirani fullscale pressure
value. A target value has not to been used.
2…255 Reserved Reserved, no action
Target value Description
– Not available
To perform the Zero Adjust pump down to a value 2 decades below the minimum
pressure range of the gauge and then start the Zero Adjust Service.
To perform the Gain Adjust vent to atmosphere and then start the Gain Adjust
Service.
8.2 Sensor Analog Input
Function Block
(Pirani)
8.2.1 Analog Input Block
Adjust Command
(ID 15)
Zero adjust algorithm
Gain adjust algorithm