GE Multilin D60 Line Distance Protection System 5-375 SETTINGS 5.2 PRODUCT SETUP5The DNP MESSAGE FRAGMENT SIZE setting determines the size, in bytes, at which message fragmentation occurs. Largefragment sizes allow for more efficient throughput; smaller fragment sizes cause more application layer confirmations to benecessary which can provide for more robust data transfer over noisy communication channels.When the DNP data points (analog inputs and/or binary inputs) are configured for Ethernet-enabled relays, checkthe “DNP Points Lists” D60 web page to view the points lists. This page can be viewed with a web browser by enter-ing the D60 IP address to access the D60 “Main Menu”, then by selecting the “Device Information Menu” > “DNPPoints Lists” menu item.The DNP OBJECT 1 DEFAULT VARIATION to DNP OBJECT 32 DEFAULT VARIATION settings allow the user to select the DNPdefault variation number for object types 1, 2, 20, 21, 22, 23, 30, and 32. The default variation refers to the variationresponse when variation 0 is requested and/or in class 0, 1, 2, or 3 scans. Refer to the DNP implementation section inappendix E for additional details.The DNP binary outputs typically map one-to-one to IED data points. That is, each DNP binary output controls a singlephysical or virtual control point in an IED. In the D60 relay, DNP binary outputs are mapped to virtual inputs. However, somelegacy DNP implementations use a mapping of one DNP binary output to two physical or virtual control points to supportthe concept of trip/close (for circuit breakers) or raise/lower (for tap changers) using a single control point. That is, the DNPmaster can operate a single point for both trip and close, or raise and lower, operations. The D60 can be configured to sup-port paired control points, with each paired control point operating two virtual inputs. The DNP NUMBER OF PAIRED CONTROLPOINTS setting allows configuration of from 0 to 32 binary output paired controls. Points not configured as paired operate ona one-to-one basis.The DNP ADDRESS setting is the DNP slave address. This number identifies the D60 on a DNP communications link. EachDNP slave should be assigned a unique address.The DNP TCP CONNECTION TIMEOUT setting specifies a time delay for the detection of dead network TCP connections. Ifthere is no data traffic on a DNP TCP connection for greater than the time specified by this setting, the connection will beaborted by the D60. This frees up the connection to be re-used by a client.Relay power must be re-cycled after changing the DNP TCP CONNECTION TIMEOUT setting for the changes to takeeffect.i) DNP / IEC 60870-5-104 POINT LISTSPATH: SETTINGS PRODUCT SETUP COMMUNICATIONS DNP / IEC104 POINT LISTSThe binary and analog inputs points for the DNP protocol, or the MSP and MME points for IEC 60870-5-104 protocol, canconfigured to a maximum of 256 points. The value for each point is user-programmable and can be configured by assigningFlexLogic operands for binary inputs / MSP points or FlexAnalog parameters for analog inputs / MME points.The menu for the binary input points (DNP) or MSP points (IEC 60870-5-104) is shown below.PATH: SETTINGS PRODUCT SETUP COMMUNICATIONS DNP / IEC104 POINT LISTS BINARY INPUT / MSP POINTSUp to 256 binary input points can be configured for the DNP or IEC 60870-5-104 protocols. The points are configured byassigning an appropriate FlexLogic operand. Refer to the Introduction to FlexLogic section in this chapter for the full rangeof assignable operands.The menu for the analog input points (DNP) or MME points (IEC 60870-5-104) is shown below. DNP / IEC104 POINT LISTS BINARY INPUT / MSP POINTSRange: see sub-menu belowMESSAGE ANALOG INPUT / MME POINTSRange: see sub-menu below BINARY INPUT / MSP POINTSPoint: 0OffRange: FlexLogic operandMESSAGE Point: 1OffRange: FlexLogic operandMESSAGE Point: 255OffRange: FlexLogic operandNOTENOTE
