public static void EcSmRequestStateAll(EC_SM req_state)
 {
     //if (Connected)
     //lock (comm_locker)
     ec_sm_request_state_extern(0, req_state);
 }
 public static void EcSmRequestState(PCS device, EC_SM req_state)
 {
     //lock (comm_locker)
     device.EcStateMachine = ec_sm_request_state_extern(device.SlaveNumber, req_state);
 }
 private static extern EC_SM ec_sm_request_state_extern(int slave_number, EC_SM req_state);