Functions for SIMATIC S7-300 and S7-400 Acyclic ... - Jonweb FA
Functions for SIMATIC S7-300 and S7-400 Acyclic ... - Jonweb FA
Functions for SIMATIC S7-300 and S7-400 Acyclic ... - Jonweb FA
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User ManualThe example provides the following function:• H<strong>and</strong>ling of parameter requests with 2 drives via the DPV1 communication channel (1 read <strong>and</strong> 2 writerequests <strong>for</strong> MASTERDRIVES VC with CU2).The following definitions apply:• The connection parameters are in DB20 (DB "slave"), DBW0 to DBW28.• Drive 1 (MASTERDRIVES VC with CU2, communication board CBP):Station number 3Communication interface in DB 20, DBW 30 to DBW 646.• Drive 2 (MASTERDRIVES VC with CU2, communication board CBP):Station number 4Communication interface in DB 20, DBW 648 to DBW 1294.In the example, the following <strong>S7</strong> blocks are used:OB1: Cyclic programFC20: Block DPV1_RWFC100: Initiate PKW requests <strong>for</strong> slaves 1 <strong>and</strong> 2DB20: DB "slave" <strong>for</strong> slave 1 <strong>and</strong> 2 (connection parameter <strong>and</strong> communication interface <strong>for</strong> slave 1<strong>and</strong> 2)In the example, the following flags are used:MB 100: Initiation bits <strong>for</strong> PKW requests to slave 1 (MASTERDRIVES VC with CU2)M100.0: P462, change index = 1, value = 50 (ramp-up time = 5s)M100.1: value of parameter 462, read index = 1M100.2: P469, change index = 1, value = 50 (rounding HLG = 50%).MB 101:Initiation bits <strong>for</strong> PKW requests to slave 2 (MASTERDRIVES VC with CU2)M101.0: P462, change index = 1, value = 50 (ramp-up time = 5s)M101.1: value of parameter 462, read index = 1M101.2: P469, change index = 1, value = 50 (rounding HLG = 50%).26.4 Program listingOB1: CycleExample program <strong>for</strong> 2 DP slavesNetwork 1 : Initiate PKW requests <strong>for</strong> slave 1 <strong>and</strong> slave 2CALL FC 100 // Start PKW requestsNetwork 2 : Read/write data set slave 1FC20 is called once per cycle <strong>and</strong> slave. Its in<strong>for</strong>mation containsthe FC20 from DB "slave".CALL FC 20 // ***** SLAVE 1 *****DBSL:=20// DB "slave"DWSL:=0// Initial address of slave 1 data in DB "slave"Network 4 : Read/write data set slave 2FC20 is called once per cycle <strong>and</strong> slave. Its in<strong>for</strong>mation containsthe FC20 from DB "slave".CALL FC 20 // ***** SLAVE 2 *****DBSL:=20// DB "slave"DWSL:=648// Initial address of slave 2 data in DB "slave"BE<strong>SIMATIC</strong> <strong>S7</strong> PROFIBUS-DP <strong>Functions</strong>© Siemens AG 1998 All Rights ReservedE20125-C0011-S302-A2-7600 19
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