Escort 3136A - 6-4-2 Command Syntax

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Query Commands

The purpose of Query commands is used for requesting the meter to respond

its current status. An example of a query command <R1> is used for

requesting the meter to respond its primary display characters.

Please refer to Section 6-5-3 for detail information about Query Commands.

6-4-2 Command Syntax

 Echo

With echo ON, the meter echoes (returns) all the characters whatever it

receives.

 Terminator

A terminator is a character sent by a host, which identifies the end of a

command string. A valid terminator consists of two-byte data:

<CR> (Carriage Return) and <LF> (Line Feed)

 Prompts

When a host sends a command string to the meter through RS-232 interface,

the meter executes the command and returns one of the prompts as shown

on Table 6-2.

Table 6-2. RS-232 Return Prompts

Prompts Description

﹡

The meter is reset to power-up initialisation status.

= > A command is executed and no errors are detected.

! > A command error is detected.

? > A parameter error is detected.

# > The local key is pressed.

S > The set up function is under executing.

@ > No numeric reading is available.

W> When the setting value HI<LO or LO>HI.

E> Execution error, or disallow to execute. For example, the

K13 will not be allowed after LLO.

 Return result

After the meter executes a query command the return of the result will be in the

following format: