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L4437A General Purpose Switch 6
L4400 User’s Guide 131
L4437A Example Program Segments
The following sections contain example program segments of commonly used
instrument functions.
The channel addressing scheme used in these segments follow the form 1ccc
where ccc is the channel number.
For detailed example programs involving multiple drivers and development
environments, refer to the L4400 Product Reference CD- ROM (p/n
34989- 13601).
Opening and Closing Channels
Example: Closing and opening channels The first two commands close
channel 3, then channel 5. The last command opens both channel 3 and
channel 5.
ROUTe:CLOSe (@1003)
ROUTe:CLOSe (@1005)
ROUTe:OPEN (@1003,1005)
Example: Querying channels for open or close state The following command
returns a 1 (true) or 0 (false) state of channel 016.
ROUTe:CLOSe (@1016)
ROUTe:CLOSe? (@1016) !Returns a 1
ROUTe:OPEN? (@1016) !Returns a 0
Reading Jumper State and System Identity
Example: Querying the power-failure state of 5 A relays The following
command returns the position of the power-fail jumper, either “MAIN” (all
relays maintain their present state when power fails) or “OPEN” (all relays
open when power fails). If this command is sent to a module other than the
L4437A, “NONE” is returned (no error is generated).
SYSTem:MODule:PFAil:JUMPer:AMP5? 1
Example: Querying the system for module identify The following command
returns the identify of the instrument.
SYSTem:CTYPe? 1
Reading Cycle Count and Resetting Modules to Power-On State
Example: Reading the cycle count for a relay The following command returns
the relay cycle count on channel 7 and channel 16.
DIAGnostic:RELay:CYCLes? (@1007,1016)