Ulvac G-Tran ISG1, Instruction Manual

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82
22.3. Standard Data Format
The table below gives the standard data sending/receiving format.
: AD0 AD1 CMD D0
･･････
Dn
SH SL CHKH CHKL CR
: Colon
AD0 Device address high order (0 – 9)
AD1 Device address low order (0 – 9)
CMD Various commands (note uppercase character/lowercase character)
D0 Data
Dn Data
SH High order of status
SL Low order of status
CHKH High order of checksum (0 - 9, A – F)
CHKL Low order of checksum (0 - 9, A – F)
CR Carriage return
* A command consists of uppercase characters and lowercase characters of alphanumeric
characters.
* Checksum is an exclusive logic sum (XOR) from AD0 to SL.
* Convert all with the ASCII code.
22.3.1.
Command list
Command Description Command Description
‘D’ Reads measurement value and status ‘1W’ Writes setpoint 1
‘SR’ Reads status ‘2W’ Writes setpoint 2
‘SW’ Writes status ‘3W’ Writes setpoint 3
‘T’ Reads software ‘ZER’ Adjusts SW1 zero point
‘1R’ Reads setpoint 1 ‘ATM’ Adjusts SW1 atmospheric pressure
‘2R’ Reads setpoint 2 ‘CLR’ Resets adjustment of SW1 zero
point, atmospheric pressure
adjustment
‘3R’ Reads setpoint 3 ‘CZR’ CCM zero point adjustment
‘CCR’ Resets CCM zero point adjustment
22.3.2.
When received normally
The following is returned when data is normally received.
When a pressure value is returned
: AD0 AD1 D X . X X E ± X X SH SL CHKH CHKL CR
When writing setpoint or adjusting
: AD0 AD1 o CHKH CHKL CR
* ‘o’ is a lowercase character.
22.3.3.
When receiving is faulty
The following is returned when not normally received or when there is no command.
: AD0 AD1 n CHKH CHKL CR
* ‘o’ is a lowercase character.