Impulse 463E - Manual (Page 79)

© Sealevel Systems, Inc. - 76 - SeaI/O User Manual
Set Module PIO Configuration
Which IOCTL_SET_PIO (5)
Description Sets the SeaIO module IO space configuration.
The last parameter is expected to be a pointer to a ‘seaio_ioctl_s’
structure. Depending on the model, several fields should be
populated before calling Ioctl.
For the 462/463 models, the u.pio.config_state.PIO96.channel1
and u.pio.config_state.PIO96.channel2 fields should each contain
a one-byte representation of the IO direction of 6 ports.
The ‘Set PIO Config’ section under Modbus commands better
describes the required data format.
Models SeaIO 462 / 463
Expected
Data Type Pointer to a seaio_ioctl_s structure
Return Codes -22 EINVAL A NULL pointer has been supplied where a
pointer to a data buffer was expected.
≥ 0 Success
( Reference the return values for both Read( ) and Write( ) )