Command 2100: Acquires the status of the specified input port in bytes

Returns the status of the specified byte port.

Each port contains 8 input channels.

Command Syntax

	bit	Name	Description
Parameter 1	15	byteportNumber	Specifies the byte port of I/O.
	14
	｜
	1
	0

Response Syntax

	bit	Name	Description
Response 1	15	reserved	Returns “0”.
	｜
	8
	7	returnValue	Returns the acuqires state by binary.
	6
	5
	4
	3
	2
	1
	0

Description

By using the command, you can check values of eight input bits at the same time.

Since eight channels can be checked at a time, the return values are integers ranging from 0-255.

See the chart below to check the correspondence of the integer return values and each input channel.

Input Channel Result (Using Byte port #0)

Return Value	7	6	5	4	3	2	1	0
1	off	off	off	off	off	off	off	on
5	off	off	off	off	off	on	off	on
15	off	off	off	off	on	on	on	on
255	on	on	on	on	on	on	on	on

Input Channel Result (Using Byte port #2)

Return Value	23	22	21	20	19	18	17	16
3	off	off	off	off	off	off	on	on
7	off	off	off	off	off	on	on	on
32	off	off	on	off	off	off	off	off
255	on	on	on	on	on	on	on	on

Example

When acquiring the value from byte port #2.

Value	23	22	21	20	19	18	17	16
7	off	off	off	off	off	on	on	on

Command	Response
0834H 0002H	0834H 0007H