Command Messages
Chapter Nine: RS-232 Communications
260
Power Control Messages
The power control messages enable you to turn the power to a channel on or off; to activate the
Auto Power feature; and to perform a hot cathode degas procedure.
Power Control Messages
Message Description
Message Format
@ command
category
command
number
Parameter
Data
Optional
checksum
Channel Power
@
0
8
1
1, 2, 3, or 4
(channel #)
: ON = on
OFF = off
CR c1
c2
Channel Auto Control
(ion gauges only)
@
0
8
2
1, 2, 3, or 4
(channel #)
: E = Enable
D = Disable
CR c1
c2
Auto Power Reference
Channel
@
0
8
3
1, 2, 3, or 4
(channel #)
: Reference
channel #
CR c1
c2
Auto Power Shutoff
Pressure
@
0
8
4
1, 2, 3, or 4
(channel #)
: ASCII value
(-1 to 1 Torr)
CR c1
c2
Hot Cathode Degas
@
0
8
5
1, 2, 3, or 4
(channel #)
: L = Lo power
H = Hi power
O = Off
CR c1
c2
Table 55: Power Control Messages
Table 58 lists the chapter that explains the function performed by each message.
Chapter References for Power Control Messages
Function
Chapter
Channel Power
Chapter Four: Operation in Normal Mode
Channel Auto Control (ion gauges only)
Chapter Seven: Operation in Setup Mode
Auto Power Reference Channel
Chapter Seven: Operation in Setup Mode
Auto Power Shutoff Pressure
Chapter Seven: Operation in Setup Mode
Hot Cathode Degas
Chapter Four: Operation in Normal Mode
Table 56: Chapter References for Power Control Messages
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