CPUM/IOCN is the original version with front panel display, supporting Modbus RTU/TCP or PROFINET (PNR 200-595-VVVV-VVV). CPUR/IOCR is a version with rack controller redundancy and supports Modbus RTU/TCP (PNR 600-007-VVV-VVV). CPUR2/IOCR2 is a version that mathematically processes fieldbus data and supports Modbus TCP and PROFIBUS DP (PNR 600-026-000-VVV). feature VM600 CPUM/IOCN rack controller and communication interface card pair, supporting Modbus RTU/TCP or PROFINET, as well as front panel display Use Ethernet or RS-4 serial connection to a computer running VM8 MPSx software to perform "one-time" configuration management of the protection cards (MPC232 and AMC600) in the VM600 rack Front panel display screen, used to visualize the monitoring output and alarm limits of the protection card Universal alarm reset (AR) for card and VM600 MPS rack (CPUM) security protection The VM600 system event and measurement event logs can be obtained through the VM600 MPSx software