DSDDE with Wonderware InTouch Writing to discrete bits using DirectNet Protocol. (R5 in this example) somewhere else in a PLC program or within InTouch as a full byte, word or double word will change the status of the discrete bits within that register. When using a read/write DDE Integer tag to access discrete.
Wonderware'beds Industrial Software Server offers several strategies to guarantee data condition. From having a very hot standby available for digesting items with Application Engine Redundancy to nearby buffering of historian data in situation of connection loss to Industrial SQL Server, Wonderware provides made system robustness a focal stage. In the search of those objectives, Wonderware provides offered a $RedundantDIObject which enables the user to recognize a major connection to the PLC simply because properly as a back-up place - turning between those two sources is automated by the object.
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There are usually two methods to keep track of the communication between InTouch and thePLC. The 1st way is definitely by making use of items (bits) congenital IO/De uma Servers are $SYS$ status (De uma Machine) or Standing (IO Machine) and the IO status. The 2nd way will be by making to make use of PLC Heart beat InTouch scripting motor.
Each of these methods provides a weakness, because if you depend on simply the 1st method, there is usually still a distance in which it can not really provide information about the status of the PLC (Halt / RUN). The second way is certainly powerful enough to keep track of InTouch-PLC conversation. The problem, if not really mixed with bits and IO Status it hard to figure out who the real lead to of this conversation error, if the IO/De uma server, wire connection or actually its PLC-STOP. To conquer these disadvantages is definitely to combine both of the ways.
How IO Standing touch, Status ($SYS$ Standing) and PLC Heartbeat monitor the status of conversation between InTouch, IO/DA Computers and the PLC can become explained as follows:
1. Bit Standing ($SYS$ Position) is definitely an natural IO/De uma Servers, acts to monitor the status of conversation between the IO/DA Hosts with PLC.
2. Little bit is furthermore natural IO Status IO/De uma Servers, acts to monitor the status of IO/De uma Hosts itself. These bits can also be utilized to monitor marketing communications between two nodes with InTouch or InTouch DDE support for programs like as Microsoft Excel.
3. PLC Heart beat is utilized to monitor the data communication between the PLC- InTouch.
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There are usually two methods to keep track of the communication between InTouch and thePLC. The 1st way is definitely by making use of items (bits) congenital IO/De uma Servers are $SYS$ status (De uma Machine) or Standing (IO Machine) and the IO status. The 2nd way will be by making to make use of PLC Heart beat InTouch scripting motor.
Each of these methods provides a weakness, because if you depend on simply the 1st method, there is usually still a distance in which it can not really provide information about the status of the PLC (Halt / RUN). The second way is certainly powerful enough to keep track of InTouch-PLC conversation. The problem, if not really mixed with bits and IO Status it hard to figure out who the real lead to of this conversation error, if the IO/De uma server, wire connection or actually its PLC-STOP. To conquer these disadvantages is definitely to combine both of the ways.
How IO Standing touch, Status ($SYS$ Standing) and PLC Heartbeat monitor the status of conversation between InTouch, IO/DA Computers and the PLC can become explained as follows:
1. Bit Standing ($SYS$ Position) is definitely an natural IO/De uma Servers, acts to monitor the status of conversation between the IO/DA Hosts with PLC.
2. Little bit is furthermore natural IO Status IO/De uma Servers, acts to monitor the status of IO/De uma Hosts itself. These bits can also be utilized to monitor marketing communications between two nodes with InTouch or InTouch DDE support for programs like as Microsoft Excel.
3. PLC Heart beat is utilized to monitor the data communication between the PLC- InTouch.