178 Appendix WAGO-I/O-SYSTEM 750750-644 Bluetooth® RF-TransceiverManualVersion 2.0.0, valid from FW/HW Version 03/03Return valuesParameters Value DescriptionMBX_RESULT MBX_CMD_OUT_OF_RANGE No error occurredMBX_CMD_INVALID_ARG Index too large or WAGO table notchosenMBX_QOS_SETTINGSMBX_BQM_NONE (0x01) No QoS enabled (standard)MBX_BQM_BEST_EFFORT (0x02) QoS is enabled in “Best Effort” modeMBX_BQM_GUARANTEED (0x03) QoS is enabled in the “Guaranteed”mode12.3.6.10 Setting QoS SettingsSetConnectionQoS, 0x89This command is used to set the settings of the “Quality-of-Service” (QoS) of aconnection. The settings only take effect when the 750-644 I/O module isswitched to the role of master.Keep factory settings!The master can connect to a maximum of 3 slaves QoS is enabled. QoS can onlybe set for 750-644 I/O modules. It improves latency by reducing deviations(outliers).Because the Bluetooth® subsystem of the 750-644 I/O module has already beenoptimized for maximum performance, any effect on the timing in “Real-TimeCommunication” mode is marginal. Therefore, it is recommended that you keepthe factory setting MBX_BQM_NONE.ConditionsMailbox size Mode Device role Saveconfig.Reboot6 12 18 Config. Real-time Ad-hoc Master Slave● ● ● ● - - ● ● ● -RequestByte 2 7 2 6 2 5 2 4 2 3 2 2 2 1 2 00 MBX_SETCONNECTIONQOS1 T -2 MBX_TARGET_TABLE_AND_INDEX3 MBX_QOS_SETTINGS
