Yokogawa Data Acquisition with PID Control CX2000 - Manual (Page 197)

7-5
IM 04L31A01-17E
7
Response
RS-422/485 Dedicated Commands and Responses
The following table shows dedicated commands for the RS-422/485 interface and their
responses.
Command Syntax Meaning Response
ESC O_xx CRLF Open the device • Response from the device with the specified address
ESC O_xx CRLF
(_ space) • Response when the instrument with the specified
address does not exist*
None
ESC C_xx CRLF Close the device • Response from the device with the specified address
ESC C_xx CRLF
(_ space) • Response when the instrument with the specified
address does not exist*
None
* Possible reasons that cause the condition “The instrument with the specified address does not
exist” are command errors, the address not matching that of the instrument, the instrument is not
being turned ON, and the instrument not being connected via the serial interface.
• The “xx” in the table indicates the device address. Specify the address that is
assigned to the instrument from 01 to 32.
• Only one device can be opened at any given time.
• When a device is opened with the ESC O command, all commands on the device
become active.
• When a device is opened with the ESC O command, any other devices that are
open are automatically closed.
• Normally, either CR+LF or LF can be used as a terminator for communication
commands. However, the terminator for these commands must be set to CR+LF.
Note
ESC is the character 1BH expressed using ASCII code. See appendix 1.
7.1 Response Syntax