PROFIBUS Bus Monitor Monitor Features Enables to record and to analyze the data communication on the bus Supports transmission rates up to 12 Mbps Monitor doesn’t need an own PROFIBUS station address, because it just listens to the communication Provides a wide range of trigger and filter functions Data are written to a rolling buffer Available as free download from the PIC web page Runs on hardware CP 5511 (PCMCIA) and CP 5611 (PCI) -

PROFIBUS Bus Monitor Start monitor Double click on monitor icon -

PROFIBUS Bus Monitor Select hardware Select board used to run the monitor (5411 (ISA), 5511 (PCMCIA) or 5611 (PCI)) -

PROFIBUS Bus Monitor Overview of PROFIBUS Monitor Features Selects HEX/DEC Display Opens Filter Window Creates Live List Starts Bus Trace Deletes All Messages Closes Data Window Opens Data Window Saves File in ASCII (Save As... Saves to a File (Save As…) Opens an Existing File Exercise: Have class open Monitor and examine features along with explanation. -

PROFIBUS Bus Monitor How to create a”Live List” 1 (1) 2 3 1) Click on heart to create “Live List”, (“Online”->”Station List”as an alternative) 2) Choose transmission rate 3) Click “OK” -

PROFIBUS Bus Monitor Result “Live List” Active stations (master)are shown in red, passive stations (slave) in blue Exercise: Set up racks/connector to show “disappearing/reappearing” stations as an aid to detecting problems. -

PROFIBUS Bus Monitor Start monitoring function - Part I (1) 1 2 3 (if used) Click on blue arrow to start monitoring, (“Online”->”Start”as an alternative) and choose stop condition; if you use a trigger condition to stop monitoring, click on “Trigger” for specification -

PROFIBUS Bus Monitor Define trigger (if used) - Part I 3B) Define address or data you want to trigger on: DA (station address of receiver) SA (station address of sender) FC (function code, e.g. high prior response to data exchange request) DSAP (service access point of receiver) SSAP (service access point of sender) DataLen (number of user data inside a telegram [bytes]) Data[N] (position of the byte inside the data unit) 3B 3A 3A) Define position of the trigger (are you mainly interested in what happens before, after or before AND after the trigger event -

PROFIBUS Bus Monitor Define trigger (if used) - Part II 3C) Define value to trigger on 3D) Define position inside data unit (only if “Message Frame” = “Data[N]”) 3C 3D Monitoring stops when ONE of the defined trigger conditions is fulfilled !!! Values !!! 2 digits mean “HEX” 3 digits mean “DEC” 3E) Perform steps 1-4 again for “Trigger 2” (if needed) 3E 3F 3F) Click “OK” to confirm your selection -

PROFIBUS Bus Monitor Start monitoring function - Part II Select used transmission rate 4 5) Select station filter (if needed) 6) Decide whether you want to see just DP related telegrams 5 6 7 7) Click “OK” to confirm your selection and start monitoring -

PROFIBUS Bus Monitor Result of monitoring function - Part I Time stamp for begin of telegram Time between last message and this one Length of user data [byte] User data Function code Error messages Used Service Access Points Used PROFIBUS service (see next page) Start Delimiter of telegram (see next page) Station address of sender and receiver -

PROFIBUS Bus Monitor Services (all services can be performed with low or high priority) SDA request (“Send Data w/ Acknowledge”; function is acknowledged by “Short Acknowledgement” frame) SDN request (“Send Data w/ No Acknowledge”; function without remote confirmation) SRD request (“Send & Receive Data”) OK (“Short Acknowledgement” frame (E5h)) DL (response to SRD request with low prior data) DH (response to SRD request with high prior data; used by DP slaves to indicate diagnostic information to the master) Token (special telegram to pass the bus control between masters) FDL_Status (request to check whether new master stations are connected to the bus) SD - Start Delimiter SD1 (=10h) - Telegrams of fixed length without data field SD2 (=68h) - Telegrams with variable length of data field SD3 (=A2h) - Telegrams of fixed length with data field (constant length) SD4 (=DCh) - Token passing SC (=E5h) - Short Acknowledgement telegram -

PROFIBUS Bus Monitor Result of monitoring function - Part II Telegram, which fulfills trigger condition is colored -