INFICON Cube CDGsci (REST Services) - Manual (Page 7)

tira88e1-a (2014-03) CDGsci.cp
7
3 Operation
Via the Ethernet / Wireless interface, the following and further data are exchanged
in the standardized REST service protocol:
• Pressure
reading
• Pressure unit (Torr, mbar, Pa)
• Zero
adjustment
• Status and error messages
• Status of the switching functions
• Set Trip Point for switching functions
Caution
Caution: data transmission errors
Any attempt to simultaneously operate the gauge via the RS232C
Serial Interface and Ethernet/Wireless interface or the diagnostic port
may result in incorrect data and data transmission errors.
Therefore, it is inadmissible to simultaneously operate the gauge via
the RS232C Serial Interface, Ethernet/Wireless interface or the
diagnostic port.
Commands are sent via the Ethernet interface based on the HTTP – Get protocol.
Thus, the commands, send and receive can be operated using a standard internet
browser.
100 ms for pressure values
500 … 1000 ms for other information or write commands
Read: http://:/1/cmd/
Write: http://:Port>/1/cmd/%20
The value is transmitted as a string back to the caller.
The input of only the command results in Cube sending the actual value of the
parameter corresponding to the command (read access). The value is transmitted
as a string terminated back to the caller.
The input of the command with a trailing parameter value will result in a writing
attempt of the value into the corresponding parameter on the Cube. If successful,
the string "o.k." is transmitted back, otherwise an error message will result.
The data type in the parameter table 4.1 indicates how the string can be inter-
preted. The column "Access Rights" denotes if the command is read only ("R") or
has a write and read access ("RW").
IP-Address & port of gauge in example: 192.168.0.248:8087
Used internet browser: Firefox v24.0
Command: AUN (display/set the currently set pressure unit)
Possible parameter values: mbar, Pa, Torr
Entry of command without parameters displays the current unit:
http://192.168.0.248:8087/1/cmd/AUN
Output in browser:
Torr
3.1 Introduction
3.2 Send and Receive
Response time
Form of the Get-Command
Example 1