Control Unit
Message to/from PLC | |
Description | Messages sent from the CNC to the PLC and others that are send from PLC to other members of the communication process, provided by the CNC, could be handled with this control unit. The CNC can send a message to the PLC using #MSG PLC [" "] or #MSG SYN PLC [...] (see [PROG]). The information which CNC command was used sending a message is included in the data of the control unit. |
| McControlMsgUnit, see description Control Unit with usage check |
ST path | pMC[channel_idx]^.addr^.MsgMcControl_Data |
Commanded, requested data | |
ST element | .CommandW . RequestR |
Data type |
|
Access | PLC writes CommandW and reads RequestR |
Usage check, commanded, requested data | |
ST element | .CommandSemaphorRw . RequestSemaphorRw |
Data type | BOOL |
Value range | [TRUE, FALSE] |
Access | commanded data PLC can write data for commanding if flag CommandSemaphorRw is FALSE. Are all data written, PLC sets CommandSemaphorRw to TRUE. CNC takes the commanded data if CommandSemaphorRw is TRUE and afterwards set it to FALSE. requested data The data a GUI wants to command could be written if RequestSemaphorRw is FALSE. If they are complete RequestSemaphorRw is set to TRUE. PLC reads the data a GUI wants to command if RequestSemaphorRw is TRUE. After the PLC has taken the data the PLC sets RequestSemaphorRw to FALSE |
Redirection | |
ST path | .EnableW |
Data type