User manual

Relay Multiplexer Command Reference 79Chapter 3

[ROUTe:]OPEN?

[ROUTe:]OPEN? <channel_list> returns the current state of the channel(s)

queried. Channel_list has the form (@ssbc) or (@ss0hbc) (see

[ROUTe:]OPEN for definition). The command returns "1" if channel(s)

are open or returns "0" if channel(s) are closed.

Comments Query is Software Readback: The ROUTe:OPEN? command returns the

current software state of the channel(s) specified. It does not account for

relay hardware failures. A maximum of 128 channels at a time can be

queried for a multiple-module switchbox.

Three/Four-Wire Modes (WIRE3/WIRE4): When configured for three- or

four-wire modes, the upper bank pair (4-7) channels cannot be queried.

If an attempt is made to query the upper bank pair (4-7) channels, an

error will be generated.

Example Query Channel Open State

This example opens channel 0, bank 0, in card #1 and channel 7, bank

6, in card #2 of a two-module switchbox and queries the channel open

states. Since the channels are programmed to be opened "1,1" is

returned.

OPEN (@100,267)

!100 opens channel 0, bank 0, card #1 and

267 opens channel 7, bank 6, card #2

OPEN? (@100,267)

!Query state of channel 0, bank 0, card #1

and channel 7, bank 6, card #2

[ROUTe:]SCAN

[ROUTe:]SCAN <channel_list> defines the channels to be scanned.

Channel_list has the form (@ss0hbc) where ss = card number (00-99),



0h = one-wire mode only high/low switching (00 or 01), b = bank number

(0-7), and c = channel number (0-7).

Parameters

Name Type Range of Values Default

<channel_list> numeric ss[00]00 to ss0177

ss00 to ss77

ss00 to ss037

1-wire

2-wire

3-wire

4-wire