Rockwell Automation 6182 SDK - Manual (Page 43)

RAC6182-Specific Extensions to the CE API 4–3
Publication 6182-UM002B-EN-P
Note that the relay contacts are normally closed (i.e., closed when the
relay is not energized). Thus, when the relay output is set to 1 or TRUE,
the contacts will be open and vice versa.
The following macros can be used (separately or bitwise ORed together)
to evaluate ucMask.
Macro Digital Output
MASK_DIAG_PIN_A J10, pin A (no external access)
MASK_DIAG_PIN_B J10, pin B (no external access)
MASK_DIAG_PIN_C J10, pin C (no external access)
MASK_DIAG_PIN_D J10, pin D (no external access)
MASK_RELAY_PIN J16 (Relay – contacts NC)
Return Value
TRUE if write operation was successful, else FALSE.
Portability
This function is specific to the RAC6182 hardware.
Example
#include
#include
int main(void)
{
UCHAR ucData = 0xff;
if (do_WritePort(MASK_RELAY_PIN, ucData))
printf(“Relay %s\n”, (MASK_RELAY_PIN & ucData) ? “closed” : “opened”);
else printf(“Error changing relay state\n”);
return(0);
}
See Also
do_SetBits, do_ClearBits, do_ToggleBits