#define MSG_CTL_VALID_START 0x0004 // start time is valid
#define MSG_CTL_VALID_PERIOD 0x0008 // period is valid
#define MSG_CTL_RELAY_MODE 0x4000 // relay output messages
-#define MSG_CTL_VALID_SYNC 0x8000 // begin time sync
+#define MSG_CTL_BEGIN_SYNC 0x8000 // begin time sync
#pragma pack(1)