Write Discrete

[cmdchars] = !L

The Write Discrete command drives targeted discrete output channels ON or OFF on the addressed FieldPoint module.

!L[positions][data]

Use !o!L for modules with 32 channels.

[positions]	Four ASCII-hex characters specify the targeted channels. A "1" in any bit means that the command writes to the corresponding channel. A zero in any bit means that the corresponding channel is not targeted. If you send !o!L, [positions] must contain eight ASCII-hex characters. Targeting an input channel or a channel that does not exist causes the command to return an error.
[data]	Four ASCII-hex characters specify all of the output levels to be written. A "1" in any bit means ON. A zero in any bit means OFF. The command ignores bits that correspond to untargeted channels. If you send !o!L, [data] must contain eight ASCII-hex characters.

E_INVALID_CMD	Undefined command.
E_INSUFF_CHARS	Data field error. An insufficient or incorrect number of characters were received for the command.
E_INV_LIMS_GOT	Specified limits invalid for the command.
E_ILLEGAL_DIGIT	One or more characters in the command could not be properly converted to a digit (hex or decimal).
E_INV_CHNL	One or more channels specified in the command either do not exist or do not support the specified operation.
E_NO_MODULE	There is no module at the specified address.

Refer to FieldPoint Responses for other possible error responses, error numbers, and error descriptions.

The following command turns channel 0 ON on the FieldPoint module at address 51 (0x33). Note that all the other "1" bits in [data] are ignored.

>33!L0001FFFF[checksum][cr]

The following command turns channel 17 ON on the FieldPoint module at address 51 (0x33). Note that all the other "1" bits in [data] are ignored.

>33!o!L00020000FFFFFFFF[checksum][cr]