Rexroth Tightening System 350 System Documentation - Rhino ...

150/316 Bosch Rexroth AG | Tightening Technology 7 Data Services7.4 Profibus DP communication7.4.4.4 Outputting of the measurement values as Int 32 numbersThe internal result values are scaled so that whole numbers are output. Scaling is done by dividing theresult values with the values from Table 7–25. All numerical values are output with 32 bits (4 bytes). Thehighest value byte (high byte) is written in the highest address, the lowest value (low byte) in the lowest.Table 7–37: 32 -bit set decimal point formatValue Unit/resolution Value range * (theoretical)Time t 10 μs 0 to 42 949 s (≈12 h)Torque T 0.000 01 Nm ± 21 474 NmAngle of turn A 0.000 1 degree ± 214 748 degrees (± 596 rotations)Gradient G 0.000 0001 Nm/° ± 214.74 Nm/°Speed n 0.000 1 rpm ± 214 748 rpmTF InXY10; input 1 = 0with X = no. of the input 11; input 1 = 1Y = value of the input 20; input 2 = 021; input 2 = 1* The number of digits after the decimal point for the torque and gradient depends on the maximum spindle torque(see Table 7–23).ExampleA torque value of 45.3 Nm is displayed as follows:45.3 Nm/0.00001 Nm = 4530000 (decimal)= 00000000010001010001111101010000 (binary)= 00 45 1f 50 (hex)and thus as follows in the byte stream of the results output:Byte n n+1 n+2 n+3Value 50 1f 45 00In contrast, the output in the byte stream listed below should be interpreted as follows:Byte n n+1 n+2 n+3Value 70 5f bc 00= 00 bc 5f 70 (hex)= 00000000101111000101111101110000 (binary)= 12345200 (decimal)= 12345200 * 0.0001 degree= 1234.52 degreesNoteAlthough the INT32 numbers can reach a higher level of resolution (e.g. 5 digits after the decimal fortorques), only the internally rounded floating decimal point value is scaled accordingly, additional digitsafter the decimal point are filled up with “0”.NoteIf docu steps are not completed or if the tightening is cancelled, no valid measurement value is available.In these cases 80 00 00 00 (hex) is output as the measurement value.System 350 | 3 608 878 040/05.2008