Ch a pt er 11 DeviceNet Re m ote I/O Module AHRTU-DNET11-10311.6.3.3 Program Control In segment 1, by triggering M1, COM1 of AH10SCM-5A will always read the preset slaveaddress including Word device and Bit device. In segment 2, by triggering M2, COM1 of AH10SCM-5A will always write to the preset slaveaddress including Word device and Bit device In segment 3, by triggering M3, COM2 of AH10SCM-5A will trigger the packet command ofGroup 1. In segment 4, by triggering M4, COM2 of AH10SCM-5A will trigger and execute the grouppackets arranged under Sequence three times.11.7 Error Diagnosis and TroubleshootingAHRTU-DNET-5A provides four means of treating the errors such as indicator diagnosis, digitaldisplay diagnosis, status word diagnosis and software diagnosis.