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Host Initiated Commands

Software Interface

Host can initiate following commands.

1. Are-You-There Command

This command is to query RS232 connection between the Host and EM3000.

Host Command ‘?’ (or 0x3F)

EM3000 Reply ‘!’ (or 0x21)

2. Pro CMD Commands

This set of commands are to configure the Engine. To confirm that a command is properly

executed, use query command to retrieve the actual value in EM3000.

2.1. Pro CMD Format

Host can send Pro CMD command following prefix, “NLS” (all upper case) or “nls”

(all lower case). A Pro CMD command consists of command code and optional equal sign,

‘=’, and command parameter:

“nls” + Command Code [+ ‘=’ + parameter]

The Pro CMD command is an ASCII string. The parameter can be decimal, such as 9876,

hexadecimal, such as 0x0a0d, or ASCII string, such as ‘“AUTO-ID”’.

NOTE: The double quotes in the ASCII string are part of the parameter, not the convention

for ASCII string. The Engine uses them to know the beginning and the end of string

parameter.

Upon receiving Pro CMD command(s), the Engine will reply a <ACK>, 0x06, or <NAK>,

0x15 within 500 ms. The Engine replies <ACK> when command is correct; otherwise, it

replies <NAK>.

2.2. Sample Pro CMD Commands

This Pro CMD command sets the Engine in auto (sensor) reading mode: “NLS0302010”.

This setting command sets sensitivity value of the auto reading mode to 10:

“NLS0312040=10”.

This setting command set the user defined prefix to AUTO-ID: nls0300000="AUTO-ID"

More Pro CMD commands are in Programming the Engine chapter.

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Newland EM3000 Especificaciones Pagina 36