SIMOVERT Master Drives Communication Board CBD

Master DrivesCBD05/20/994 Data transfer via DeviceNet4.3 Process data area (PZD)4.3.1 Setting the number of PZD words4.3 Process data area (PZD)Control words and setpoints (tasks: Master → Drive) and status words and actual values (responses: Drive →Master) are transferred using process data (PZD). At the drive, the process data is processed with the highest priorityand in the shortest time segments. The drive is controlled using the process data, for example, motor start/ stop andsetpoint input.4.3.1 Setting the number of PZD wordsDeviceNet IO Message Connections are used to transfer process data. The number of process data words (4, 8, or16) is determined by which DeviceNet I/O Assembly Instance is selected. The send and receive lengths can bedifferent. The I/O Assembly Instance selection can be changed by 2 different methods described below. For eithermethod, the following I/O Assembly definitions are used:For Consumed connection path for Poll I/O only (tasks: Master → Drive), the choices are:“120” first 4 PZD control and reference words “121” first 8 PZD words “122” all 16 PZD wordsFor Produced connection path for Poll I/O only (responses: Drive → Master), the choices are:“170” first 4 PZD status and actual value words “171” first 8 PZD words “172” all 16 PZD wordsFor Produced connection path for Bit Strobe I/O only (responses: Drive → Master), this path is fixed at:“170” first 4 PZD status and actual value words. It can not be changed.(Method 1)Setting the power-up and reset default value of the appropriate produced or consumed connection path.Base drive parameters P696 and P697 are used for this purpose. The I/O Assembly Instance is selectedusing a 3 digit number equivalent to the 3 character ASCII symbol for the I/O assembly. This is therecommended method.P696P697“CB parameter 1” -- sets the power-up and reset default value of the produced connection path ofthe DeviceNet polled I/O for the CBD. The selection choices: = 170 or 171 or 172“CB parameter 2” -- sets the power-up and reset default value of the consumed connection pathof the DeviceNet polled I/O for the CBD. The selection choices: = 120 or 121 or 122P696 and P697 can be set independently. They can be set to the same or different PZD lengths.The produced connection path of the DeviceNet bit strobe I/O for the CBD is fixed at 170.Siemens AG 477 759 4070 76 J AA-74 31SIMOVERTMASTERDRIVES Betriebsanleitung/OperatingInstructions