DEV 1951 - Set Signal Path (M)

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User Manual DEV 1951

88  Copyright DEV Systemtechnik GmbH 2004-2017

5.6.3.5 Set Signal Path (M)

This is the command for switching the switch module ooo to the input port iii.

with:

ooo = the switch module number. ooo is 001 if the first switch module is to be

switched and ooo can be 002 if there are two switch modules installed and

if the second switch module is to be switched;

iii = the input port number to which the switch module is to be connected to,

either 001 or 002 if command set 1 is active,

and ranging from 001 to 004 if command set 2 is active, see below.

The device confirms the command with an <ACK> if the command is accepted and

with a <NAK> otherwise.

Note:

 If a parameter exceeds the permissible range or if the device is not in Remote

Mode, a <NAK> is returned.

For the DEV 1951 there is a distinction between two command sets. This distinction

is made only if there are installed two switch modules.

5.6.3.5.1 Command Set 1

Command set 1 is the standard command set which is activated after power on.

It is always active if there is installed a single switch module, only.

The switching command syntax and the meaning of ooo was described in chapter

5.6.3.5, the meaning of iii in command set 1 is

iii = the input port number either 001 for port "In A" or 002 for port "In B".

5.6.3.5.2 Command Set 2

Command set 2 is applicable only if two switch modules are installed.

Command set 2 is activated by issuing the M command with addressing the input

ports of the second switch module as 003 and 004 (instead of 001 and 002).

The switching command syntax and the meaning of ooo was described in chapter

5.6.3.5, the meaning of iii in command set 2 is

iii = the input port number ranging from 001 to 004:

first switch module / primary input port "In A" = 001

first switch module / secondary input port "In B" = 002

second switch module / primary input port "In A" = 003

second switch module / secondary input port "In B" = 004.

Note:

 The idea of command set 2 is to treat the device as a matrix with four input

ports and with two output ports, but of course the input ports of the first

switch module cannot be routed to the output port of the second switch

module and vice versa.

 Once command set 2 is activated it is valid until a device reset, i.e. there is no

command to switch back to command set 1.

 Naturally, command set 2 affects the responses to a switching status query

(please refer to chapter 5.6.3.4).

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DEV 1951 - Set Signal Path (M)

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