Parameter Declaration Data type Memory block DescriptionRECNUM INPUT BYTE I, Q, M, D, L,constantRecord set number(permitted values: 0 ... 240).RET_VAL OUTPUT INT I, Q, M, D, L If an error occurs while the function is active, thereturn value contains an error code.If no error occurred during the transmission, thefollowing two cases are distinguished:n RET_VAL contains the length of the actuallyread record set in bytes if the destination areais larger than the read record set.n RET_VAL contains 0 if the length of the readrecord set is equal to the length of the desti-nation area.BUSY OUTPUT BOOL I, Q, M, D, L BUSY = 1: The job is not yet closed.RECORD OUTPUT ANY I, Q, M, D, L Destination area for the read record set. Onlydata type BYTE is permitted. Note: Note that theRECORDparameter of CPUs always required thefull specification of the DB parameters.(for example: P#DB13.DBX0.0 byte 100).Omitting an explicit DB number is not permittedfor CPUs and causes an error message in theuser program.Ä Chap. 14.1.45 ‘SFC 57 - PARM_MOD - Parameterize module’ page 69614.1.59 SFC 105 - READ_SI - Reading Dynamic System ResourcesWhen messages are generated with SFCs 107 ALARM_DQ and 108 ALARM_D, theoperating system occupies temporarily system memory space. For example, if you do notdelete a FB that exists in the CPU with SFC 107 or SFC 108 calls it may happen thatcorresponding system resources stay permanently occupied.If you reload the FB with SFC 108 or SFC 108 calls, it may happen that the SFCs 107and 108 are not processed properly anymore.With SFC 105 READ_SI you can read currently used system resources occupied with theSFCs 107 and 108 when messages were generated.This is done via the values of EV_ID and CMP_ID used in this place. The values arepassed on to SFC 105 READ_SI in parameter SI_ID.SFC 105 READ_SI has four possible operating modes that we explain in the table below.Set the desired operating mode via theMODE parameter.MODE Which of the system resources occupied by SFC 107/SFC 108 areread?1 All (call of SFC 105 with SI_ID: =0)2 The system resource occupied by the call of SFC 107-/SFC 108 withEV_ID:= ev_id (call of the SFC 105 with SI_ID: = ev_id)Error InformationOverviewDescriptionVIPA SPEED7 Integrated StandardSystem Functions > SFC 105 - READ_SI - Reading Dynamic System ResourcesHB00 | OPL_SP7 | Operation list | en | 18-30 723
