Details
This command allows you to separate the opening and closing of channels and analog backplane
relays when measuring. You can execute any number of commands between the open and close
commands to meet your application needs.
The configuration (dmm.getconfig()) associated with the specified channel dictates whether a
paired channel is open or not. For channel patterns, the channels associated with it are opened. A
channel pattern includes a paired channel for multi-wire measurement if a channel is configured that
way when the pattern is created (see commands channel.setpole() and
channel.pattern.setimage()).
The configuration (dmm.getconfig()) dictates whether analog backplane relays 1 and 2 are
opened and if a paired channel is opened. The dmm.open() function does not use the analog
backplane relays specified by the channel.setbackplane() function or pole settings set by the
channel.setpole() function.
An error is generated and the channels do not open if:
• An empty parameter string is specified.
• The specified channel or channel pattern is invalid.
• A channel number does not exist for installed card in slot specified.
• A slot is empty.
• The channel pattern does not exist.
• The channel does not support being closed (for example, a digital I/O channel).
• The channel is paired with another bank for a multi-wire application.
• The channel configuration is "nofunction".
• More than one channel or channel pattern is specified in the parameter.
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