MKS Granville-Phillips 358 series, Instruction Manual

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Preparing for Operation
Series 358 Micro-Ion Controller Instruction Manual - 358013 - Rev. B
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To Modify a Setpoint
1. Set the selector switch to the number of the channel you wish to modify
(see Figure 5-16).
2. Press and hold one of the setpoint Set pushbuttons for the direction you
wish the setpoint to change.
3. The setpoint will scroll until the switch is released. It will scroll slowly
until a decade boundary is crossed and then will speed up to facilitate
rapid changes across many decades. Release the switch when you
have entered the desired decade, and then re-depress it to scroll slowly
within the decade to reach the exact setpoint needed.
After the setpoint switch is released, the display will return to pressure data
after two seconds. At this time, the new setpoint will be deposited in
non-volatile memory.
If the ion gauge is OFF, PC relays 1 and 2 will deactivate.
5.13 Preparing to use RS-232
Computer Interface
Consult the user's manual for the host computer to be sure the protocol used
is in accord with that established via the switch configuration you have
chosen for the controller RS-232 module.
Communication with the controller VGC is via ASCII strings. A message to
the controller consists of a command and a command modifier, followed
by a terminator. The message may contain leading spaces, and the
command and modifier may optionally be separated by spaces or commas.
No spaces may appear within the command or the modifier, only between
them.
The terminator expected by the controller is an ASCII carriage-return and
line-feed, denoted here by CRLF. A carriage return, code CR, is hex 0D or
decimal 13. A line feed, code LF, is hex 0A or decimal 10. The
carriage-return is optional, and messages terminated with only the line-feed
will be accepted. Note that the CRLF terminator is, in general, appended
automatically by the host computer's interface software to the message
string supplied by the user.
If extra characters are found in the message after it has been successfully
interpreted but before the terminator, they will be ignored.
All characters should be upper-case.
All messages to the controller will receive a reply, consisting of an ASCII
string terminated with CRLF. Numbers will be returned in the format
X.XXE±XX.