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Page 21
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Operation
D397-53-880 Issue C
Output Byte: Single byte is Gas Ballast valve control.
Values: 1=Open
2=Closed
3=Return to normal behavior
other values - ignored
Input Bytes:Valve state.
Values: 0=Off
(Closed)
4=On (Open)
2nd input byte is condition byte (see Section 4.6.4).
4.7.18
Module 47 - Inlet Purge
This module provides Control of the Inlet Purge Gas valve and feedback of its actual state. Normally Inlet Purge Gas
valve operation is controlled by the main DP control function (module 11) and use of this module can override the
(automatic) Inlet Purge Gas valve control from that module.
Output Byte: Single byte is Inlet Purge valve control.
Values: 1=Open
2=Closed
3=Return to normal behavior
other values - ignored
Input Bytes:Valve state.
Values: 0=Off
(Closed)
4=On (Open)
2nd input byte is condition byte (see Section 4.6.4).
4.7.19
Module 7 - MB Current
Output Bytes: None
Input Bytes:
Bytes 1 & 2 form a 16-bit signed number for MB current in 0.1 A.
Byte 3 is condition byte (see
4.7.20
Module 8 - MB Power
Output Bytes: None
Input Bytes:
Bytes 1 & 2 form a 16-bit unsigned number for MB Power in 0.1 kW.
Byte 3 is condition byte (see
4.7.21
Module 174 - MB Speed Absolute
This module will only be valid on inverter driven pumps.
Output Bytes: None
Input Bytes:
Bytes 1 & 2 form a 16-bit unsigned number for actual MB speed in 0.1 Hz.
Byte 3 is condition byte (see
WARNING
Configuring this module contains significant risk as if the pump is stopped with the valve open the
vacuum system may over-pressurise.
