Granville-Phillips Mini-Convectron 275 Series, Инструкция по установке, эксплуатации и обслуживанию

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24 Mini-Convectron
®
Module with DeviceNet
®
Digital Interface
Chapter 4
Atmospheric
Adjustment 1. Allow the chamber pressure to rise to atmospheric pressure.
2. Use Table 4-10 to determine the atmospheric pressure (Torr) for your
altitude and enter the data value for the Atmospheric Adjust Service.
Using Input Polled
I/O
When a master polls the module for measured pressure, the format of the
returned pressure value depends on the data type.
To configure the data format for input polled I/O, see Table 4-5.
Table 4-10 Atmospheric Adjustment Parameters
Altitude Above Sea Level (feet) Air or N
2
Pressure (Torr)
0 760
1,000 733
2,000 707
3,000 681
4,000 656
5,000 632
6,000 609
7,000 586
8,000 564
9,000 543
10,000 523
Table 4-11 760 Torr Example
Parameter Service Class Instance Data
Gain Adjust 4C
hex
31
hex
1 00 00 3E 44
hex
Table 4-12 Input polled I/O for pressure values
Pressure values are transmitted in low byte to high byte order.
Instance Typical device data Data type Description
1 23 79
hex
UINT UINT vacuum pressure (760 Torr)
2 00
23 79
hex
STRUCT BYTE exception status
UINT vacuum pressure
4 00 00 3E 44
hex
REAL REAL vacuum pressure
5
(default) 00
00 00 3E 44
hex
STRUCT BYTE exception status
REAL vacuum pressure (760 Torr)