Measurement Specialties 9116 user manual Responses, An Acknowledge with Data response, or

Pressure Systems, Inc. Model 9116 User’s Manual

3.1.3Responses

Four (4) types of responses can be returned from a Model 9116 Intelligent Pressure Scanner module:

•an Error response,

•an Acknowledge response,

•an Acknowledge with Data response, or

•a Network Query response.

The first three may be returned by TCP/IP commands, the latter from a UDP/IP command.

The error response consists of the letter ‘N’ (for NAK, or negative acknowledge), followed by a 2-digit hexadecimal error code. The following table lists the error codes that can be returned from a Model 9116 module:

	Table 3.1
	Error Codes
CODE	MEANING
00	(Unused)
01	Undefined Command Received
02	Unused by TCP/IP
03	Input Buffer Overrun
04	Invalid ASCII Character Received
05	Data Field Error
06	Unused by TCP/IP
07	Specified Limits Invalid
08	NetScanner error; invalid parameter
09	Insufficient source air to shift calibration valve
0A	Calibration valve not in requested position

The Acknowledge response is returned from a module when a command is received that requires no data to be returned, and no error is detected. It indicates successful parsing and execution of the last received command. It consists of the letter ‘A’ (for ACK, or acknowledge).

The Acknowledge with Data response is returned when a module receives a command requesting data. Model 9116 modules will typically return only the requested data values, each preceded by a space character (except for format 7). No ‘A’ acknowledge letter begins this data response. Data are returned for the highest requested channel number first.

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