CHAPTER 6: ACTUAL VALUES STATUSB30 BUS DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 6-1166.3.19 Remaining connection statusACTUAL VALUES STATUS COMM STATUS REMAINING CONNECTThese values specify the remaining number of TCP connections still available for each protocol. The display depends on theoptions applicable to your device. Each time a connection is used, the remaining number of connections decrements.When released, the remaining number of connections increments. If no connection is made over the specific protocol, thenumber equals the maximum number available for the specific protocol.For example, the maximum number of Modbus TCP connections is 4. Once an EnerVista session is opened on a computerconnected to the UR over Ethernet, the Modbus TCP status shows 3. If the EnerVista application is closed, the Modbus TCPstatus shows 4.For the graphical front panel, the remaining connections refer to TCP connections only.MMS TCP — The number of IEC 61850 connections remaining.6.3.20 Parallel Redundancy Protocol (PRP)The Parallel Redundancy Protocol (PRP) defines a redundancy protocol for high availability in substation automationnetworks.ACTUAL VALUES STATUS PRP STATUSTotal Received Port A is a counter for total messages received (either from DANPs or from SANs) on Port A.Total Received Port B is a counter for total messages received (either from DANPs or from SANs) on Port B.Total Errors is a counter for total messages received with an error (bad port code, frame length too short).Mismatches Port A is a counter for total messages received with an error on Port A (PRP frame, but port received throughand LAN ID in the frame do not match). COMM STATUS REMAINING CONNECT MMS TCP(max 5)5Range: 0 to 5 MODBUS TCP (max 4)4Range: 0 to 4 DNP TCP(max 2)2Range: 0 to 2 IEC-104 TCP(max 2)2Range: 0 to 2 SFTP (max 4)4Range: 0 to 4 PRP STATUS Total Rx Port A:0Range: 0 to 4G, blank if PRP disabled Total Rx Port B:0Range: 0 to 4G, blank if PRP disabled Mismatches Port A:0Range: 0 to 4G, blank if PRP disabled Mismatches Port B:0Range: 0 to 4G, blank if PRP disabled Total Errors:0Range: 0 to 4G, blank if PRP disabledThe B30 is provided with optional PRP capability. This feature is specified as a software option at the time ofordering. See the Order Codes section in chapter 2 for details.
