Nordson Encore Customer Product Manual
Also see for Encore: Customer product manualProduct manualCustomer product manualOperator cardInstruction sheet
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Contents
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Encore Engage Gateway 15Part 1615959−01 2019 Nordson CorporationIO Image Table − Module DefinitionsEach IO module serves a specific purpose in transferring data either to orfrom a gun control node. The terms output and input image tables arereferenced from the perspective of the PLC. The following tables describethe contents of the IO image tables.Output Image TableSee Table 3.All of the data contained in the Output Image Table are written by the PLCto its main IO memory space. A general description of how the data of thePLC’s output image table flows through the system until it arrives at the guncontrol nodes follows. The PLC writes the data to the relative addressesshown as “Address Offset” (See Table 3) representing locations in the PLC’soutput image table. The fieldbus main sends this data to the Gateway’sfieldbus secondary where the data is written to the dual port memory by thePC controller. The relative address of the data in the dual port memory isidentical to the Address Offset used by the PLC. Finally, the data is readfrom the dual port memory by the Gateway’s DSP controller and processedto create a CAN message. This message is sent to the gun control node(s)on the CAN network.IO Module 1When the Gateway detects a new non-zero value in the first byte of IOModule 1, it will send a broadcast message to all nodes.The value in the first byte is the broadcast message number. The next 8bytes of IO Module 1 contain data specific to that message number.IO Module 2When the Gateway detects a change in either of the 2 bytes of IO Module 2(provided the first byte does not equal 0), it will send a multicast messageout to the two nodes (KV and Flow/Pump) associated with the specified gunnumber.IO Module 3When the gateway detects that a change has taken place in the KVparameters of IO Module 3, it will send a unicast message out to thespecified gun’s KV node. If the flow parameters in IO Module 3 changed,then the gateway will send a unicast message to the specified gun’s flownode. If the gateway detects changes to both KV and flow parameters, it willsend two unicast messages out; one to the specified gun’s KV node andanother to the flow/pump node.Before setting new KV or flow parameter values, clear the first byte of IOModule 3 to 0. After new values are written, set the first byte to 1. |
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