Instruction manual

8-13

8-7 Command Mode

The indicator receives a command transmitted from a peripheral unit like a computer in the

communication procedure shown below, and operates in compliance with the command and responds

with a result.

* The communication procedure depends on the type of command.

* When the command is not accepted due to an error (improper command or faulty data), a

“negative acknowledgment” is made.

Communication procedure

Procedure Response to Acceptable Commands

Host command

Indicator command

Procedure A

Returns the same command as the one sent from the host for a sign of the

acknowledgement.

Host command

Indicator data

Procedure B

Returns the data that the command requested.

Host command data

Indicator command data

Procedure C

Returns the same command for a sign of the acknowledgement, and sends the

requested data with terminators, CR or CR LF (selectable at RSF-07)

Host command

Indicator data data

…

data EOF

Procedure D

Returns all the requested data. Each command differs in the number of output

data

Press [ESC] to stop the data flow in the middle.

Response

* Any response to a command is made within 200 ms after receiving the command.

Type Response

Procedure A Returns the same command.

Procedure B, D Returns the data.

Acknowledgement

Procedure C

Returns the same command

and waits to receive the data.

Negative Acknowledgement: Improper mode

Not acceptable because of a wrong mode.

Negative Acknowledgement: Improper Range

Not acceptable because data is out of the range.

Negative Acknowledgement: Improper Command / Data

Not acceptable because of a wrong data format