INFICON PSG55x ATM to Medium Vacuum Gauge (EtherCAT) - Manual (Page 27)

tira85e1 (2013-06) PxG55x.cp
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High Trip Hysteresis: Hysteresis value for High Trip Point.
Low Trip Hysteresis: Hysteresis value for Low Trip Point.
Object index of active source of (I 0x900F SI 0x01) Input Value.
Source Index
Bit 16…31
Bit 08…15
Bit 00…07
Index
Subindex
Reserved
This chapter describes the configuration area for the PCG without ATM.
Calculating the High Trip Point and Low Trip Point → 4.4.7.
Index SI DataType NV Access PM Name
8000 or
8010 0x01 REAL32 x RW Cross Over Area Upper
Limit
0x02 REAL32 x RW Cross Over Area Lower
Limit
Upper limit of the cross over area.
At low pressures, only the signal of the Pirani sensor is used for pres-
sure measurement; at high pressures, only the signal of the diaphragm
capacitive sensor. To determine the output signal in the cross over area,
both signals are used proportionally to the pressure.
Lower limit of the cross over area.
Index SI DataType NV Access PM Name
8001 0x01 REAL x RW Zero Adjust Mode
If set the CDG Sensor will be adjusted automatically through the Pirani sensor.
The High Trip Point is calculated by:
High Trip Point = Value *) × Percentage **)
*)
Value from Piezo Sensor (I: 0x6010, SI: 0x11)
**) Percentage High Trip Source (I: 0x800E/F, SI: 0x13)
In this case, the High Trip Point value is automatically updated by the device itself.
Any user-written value to the parameter High Trip will be refused with an abort
code.
The Low Trip Point is a fixed value:
The value defined in Low Trip Point Limit is compared with the pressure value
referenced by the Source Index parameter.
Subindex 0x17
Subindex 0x18
Subindex 0x1A
4.8 PCG without ATM,
Configuration Area
(0x8000…0x8FFF)
4.8.1 Configuration Common
Module
Subindex 0x01
Subindex 0x02
4.8.2 Configuration
Capacitance Diaphragm
Subindex 0x01
4.8.3 Configuration Trip
Point 1