Note

Configuring Output Channel Polarity

The INP:DEB:TIME generate the error 3108, "E1536 debounce - each referenced 4 Ch bank must contain at least one input". This error indicates that you tried to set a debounce time for a bank of channels that contains no input configured channel.

To set the debounce period to 153.6 ms for the lower 4 channels on an VT1536A in SCP position 0 send:

INP:DEB 0.1536,(@100:103)

To set the debounce period to 1.229 seconds for the upper 4 channels on an VT1536A in SCP position 3 send:

INP:DEB 1.229,(@128:131)

There is also the query form; INPut:DEBounce:TIME? (@<channel>)

where <channel> must specify a single channel. INP:DEB:TIME? returns the currently set debounce period.

To configure output channel polarity use the command:

OUTPut:POLarity INVerted NORMal,(@<ch_list>)

To configure the fifth and sixth channels on an VT1536A in SCP position 4 to output normal polarity (logical 1=relay on) and its next 2 channels to output inverted polarity (logical 1=relay off) send:

OUTP:POL

NORM,(@136,137)

NORM is *RST default

OUTP:POL

INV,(@138,139)

 

There is also the query form; OUTPut:POLarity? (@<channel>), where <channel> must specify a single channel. OUTP:POL? returns "NORM" or "INV".

Notes 1. The OUTPut:POL command will generate the error 3107, "Channel data direction conflicts with command" if any channel in <ch_list> is configured as an input.

2.An output channel's SS relay will not change from the *RST state (open) regardless of its POLarity setting, until an algorithm writes a value to that channel.

VT1536A Isolated Digital Input/Output SCP 13

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VXI VT1536A user manual Configuring Output Channel Polarity

VT1536A specifications

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