Advantech Data Acquisition Modules ADAM 4000 Instrukcja Użytkownika Pobierz pdf (Strona 247)

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101

Digital I/O and Relay Output

Counter/Frequency Command Set

ADAM 4000 Series User’s Manual

$AA4

Name Read Synchronized Data command

Description The addressed digital I/O module is instructed to return the

value that was stored in its register by a Synchronized

Sampling command.

Syntax $AA4(cr)

$ is a delimiter character.

AA (range 00-FF) represents the 2-character hexadecimal

address of returning data.

4 is the Read Synchronized Data command.

(cr) is the terminating character, carriage return (0Dh).

Response !(status)(dataOutput)(dataInput)00(cr)

if the command was valid. (ADAM-4050)

!(status)(dataInput)0000(cr)

if the command was valid. (ADAM-4052)

!(status)(dataInput)(dataInput)00(cr)

if the command was valid. (ADAM-4053)

!(status)(dataOutput)0000(cr)

if the command was valid. (ADAM-4060/4068)

?AA(cr) if an invalid command has been issued.

There is no response if the module detects a syntax or

communication error, or even if the specified address does

not exist.

! is a delimiter character which indicates a valid command.

? is a

delimiter character which indicates an invalid

command.

AA (range 00-FF) represents the responding 2-character

hexadecimal address of the digital I/O module.

(status) will tell you if the data (data) from the last

Synchronized Sampling command (#**) have already been

sent. If (status=1), data have only been sent for the first

time after a Synchronized Sampling command was issued.

If (status=0), then the data have been sent at least once

since no Synchronized Sampling command was issued.

4050, 4051, 4052, 4053,

4055, 4060, 4068,

1 2 ... 242 243 244 245 246 247 248 249 250 251 252 ... 428 429

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