GE 1601-0149-A2 - Manual

Modbus Protocol 489 Communications Guide http://www.GEindustrial.com/multilin 2 GE Multilin Data Packet Format A complete request/response sequence consists of the following bytes (transmittedas separate data frames):1. A Master Query Message consisting of: a 1-byte Slave Address , a 1-byte Func- ti...

Modbus Functions 489 Communications Guide http://www.GEindustrial.com/multilin 3 GE Multilin CRC-16 Algorithm Once the following algorithm is complete, the working register “A” will contain theCRC value to be transmitted. Note that this algorithm requires the characteristicpolynomial to be reverse b...

Modbus Functions 489 Communications Guide http://www.GEindustrial.com/multilin 4 GE Multilin Function Codes 03/04: Read Setpoints / Actual Values Modbus implementation: Read Input and Holding Registers489 Implementation: Read Setpoints and Actual ValuesFor the 489 Modbus implementation, these comman...

Modbus Functions 489 Communications Guide http://www.GEindustrial.com/multilin 5 GE Multilin Function Code 05: Execute Operation Modbus Implementation: Force Single Coil489 Implementation: Execute OperationThis function code allows the master to request specific 489 command operations.The command nu...

Modbus Functions 489 Communications Guide http://www.GEindustrial.com/multilin 6 GE Multilin Function Code 07: Read Device Status Modbus Implementation: Read Exception Status489 Implementation: Read Device StatusThis function reads the selected device status. A short message length allows forrapid r...

Modbus Functions 489 Communications Guide http://www.GEindustrial.com/multilin 7 GE Multilin Function Code 16: Store Multiple Setpoints Modbus Implementation: Preset Multiple Registers489 Implementation: Store Multiple SetpointsThis function code allows multiple Setpoints to be stored into the 489 m...

Modbus Functions 489 Communications Guide http://www.GEindustrial.com/multilin 8 GE Multilin Function Code 16: Performing Commands Some PLCs may not support execution of commands using function code 5 but dosupport storing multiple setpoints using function code 16. To perform this operationusing fun...

Modbus Memory Map 489 Communications Guide http://www.GEindustrial.com/multilin 9 GE Multilin Modbus Memory Map Memory Map Information The data stored in the 489 is grouped as Setpoints and Actual Values. Setpoints canbe read and written by a master computer. Actual Values are read only. All Setpoin...

Modbus Memory Map 489 Communications Guide http://www.GEindustrial.com/multilin 10 GE Multilin Each communications port can individually select the ID number of the event ofinterest by writing address 3003h. This way the front port, rear port and auxiliaryport can read different events from the even...

Modbus Memory Map 489 Communications Guide http://www.GEindustrial.com/multilin 40 GE Multilin Memory Map Data Formats The data formats used in the Modbus memory map are shown below. Table 2: Data Formats (Sheet 1 of 12) CODE TYPE DEFINITION F1 16 bits UNSIGNED VALUE Example: 1234 stored as 1234 F2 ...

DNP Protocol 489 Communications Guide http://www.GEindustrial.com/multilin 46 GE Multilin DNP Protocol Device Profile Document The communications port configured as a DNP slave port must support the full set offeatures listed in the Level 2 DNP V3.00 Implementation (DNP-L2) described inChapter 2 of ...

DNP Protocol 489 Communications Guide http://www.GEindustrial.com/multilin 47 GE Multilin Implementation Table The table below gives a list of all objects recognized and returned by the relay.Additional information is provided on the following pages including a list of thedefault variations returned...

DNP Protocol 489 Communications Guide http://www.GEindustrial.com/multilin 48 GE Multilin Default Variations The following table specifies the default variation for all objects returned by therelay. These are the variations that will be returned for the object in a responsewhen no specific variation...

DNP Point Lists 489 Communications Guide http://www.GEindustrial.com/multilin 49 GE Multilin DNP Point Lists Binary Input / Binary Input Change (Objects 01/02) The point list for Binary Inputs (Object 01) and Binary Input Change (Object 02) isshown below: Table 5: Binary Inputs (Sheet 1 of 4) Idx De...

DNP Point Lists 489 Communications Guide http://www.GEindustrial.com/multilin 51 GE Multilin Binary / Control Relay Output Block (Objects 10/12) The following restrictions should be noted when using object 12 to control the pointslisted above:1. The Count field is checked first. If it is zero, the c...

DNP Point Lists 489 Communications Guide http://www.GEindustrial.com/multilin 52 GE Multilin Binary / Frozen Counter (Objects 20/21) The counters cannot be cleared with the Freeze/Clear function codes (9/10).Instead, the control relay output block points can be used to clear groups ofcounters. There...

489 Communications Guide http://www.GEindustrial.com/multilin i GE Multilin Index A ANALOG INPUTS DNP point list ................................................................ 2-53 B BAUD RATE ...................................................................... 2-1BINARY COUNTER DNP POINTS ........