WAGO-I/O-SYSTEM 750 Process Image 45750-644 Bluetooth® RF-TransceiverManualVersion 2.0.0, valid from FW/HW Version 03/03Pos : 70.1 /All e Seri en ( Allgemei ne Module)/Ü bers chriften für alle Serien/Pr oz ess abbild - Übersc hrift 1 @ 4\mod_1240983067828_21.doc x @ 31942 @ 1 @ 16 Process ImagePos : 70.2 /Serie 750 (WAGO-I/O-SYST EM)/Proz ess abbild Kl emmenbus /Sonder klemmen/Pr ozessabbild 750- 0644 @ 16\mod_1376493533069_21.doc x @ 128954 @ 2233233334444 @ 1The process image of the 750-644 I/O module is used to exchange data with,configure, parameterize and diagnose devices connected wirelessly.Figure 10: Cyclic and acyclic communicationThe size of the process image of the 750-644 I/O module is always identical forinput and output data. Possible settings are 12, 24 and 48 bytes.Depending on the current configuration of the 750-644 I/O module and how it isused, the process image is divided into various segments: Fixed components are acontrol/status byte (C/S byte) and a null byte. The rest of the process image can beused for register communication, Mailbox configuration or process data exchange(see also figure “Segments of the Process Image”).• If the process image is used for register communication, it is not availablefor data exchange with remote Bluetooth® SPP devices or for configuringthe 750-644 I/O module using the Mailbox protocol. Regardless of theoperating mode, all bytes of the process image are invalid that are notoccupied by data for register communication.• In “Configuration” mode, the Mailbox protocol can be used forconfiguration. For this purpose, the Mailbox is activated using a bit incontrol byte C0. If the Mailbox is activated, it occupies 6, 12 or 18 bytes inthe process image. The 750-644 I/O module populates any remaining byteswith 0.• In “Real-Time Communication” and “Ad-hoc Communication” modes, upto 7 segments of configurable size (hereafter also referred to as “slots”) areavailable for exchanging process data with remote Bluetooth ® SPP devices.The Mailbox can also be activated in both operating modes and then over-
