rename

drivers/apc_modbus.c

@@ -25,7 +25,7 @@
 #define DRIVER_NAME	"NUT APC Modbus driver"
 #define DRIVER_VERSION	"0.01"
 
-#define MODBUS_SLAVE_ID 1
+#define MODBUS_DEFAULT_SLAVE_ID 1
 
 /* Variables */
 static modbus_t *modbus_ctx = NULL;
@@ -192,11 +192,11 @@ void upsdrv_initups(void)
 		fatalx(EXIT_FAILURE, "Unable to create the libmodbus context");
 	}
 
-	// TODO: getval for slave id, this is configurable on some devices and can be useful where
-	r = modbus_set_slave(modbus_ctx, MODBUS_SLAVE_ID);	/* slave ID */
+	// TODO: getval for slave id, this is configurable on some devices and can be useful where multiple UPS are connected to an actual bus
+	r = modbus_set_slave(modbus_ctx, MODBUS_DEFAULT_SLAVE_ID);	/* slave ID */
 	if (r < 0) {
 		modbus_free(modbus_ctx);
-		fatalx(EXIT_FAILURE, "Invalid modbus slave ID %d",MODBUS_SLAVE_ID);
+		fatalx(EXIT_FAILURE, "Invalid modbus slave ID %d",MODBUS_DEFAULT_SLAVE_ID);
 	}
 
 	if (modbus_connect(modbus_ctx) == -1) {