Burkert Type SE56 - Manual (Page 34)

TECHNICAL MANUAL Rev. Pagine 34/52
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03 PROFIBUS DP MODULE- DATA LINK
DESCRIPTION
Document Data Date Date
File name ProfibusDP_emanual_Burkert_04.doc 19/03/08 19/03/08 19/03/08
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byte 0: (8 bits integer) current INDEX Input
byte 1: (8 bits integer) current INDEX Output
bytes 2-5: (32 bit single precision IEEE floating point, MSB first) Flow rate scale range in t.u.
bytes 6-10: (5 bytes ASCII) flow rate measurement unit
bytes 12-14: (3 bytes ASCII) measurement unit of the counters
byte 16: (8 bits integer) number of decimals after the point for totalizers display
byte 17: (8 bits integer) number of decimals after the point for flow rate display
bytes 18-21: (32 bit long integer, MSB first) clock expressed in minutes starting from 01-01-1992 (only
for ML 210)
byte 22: (8 bits integer) measurement samples per second (Hz)
byte 20=10(dec) measurement frequency = 10 Hz
byte 20=20(dec) measurement frequency = 20 Hz
byte 20=50(dec) measurement frequency = 50 Hz
byte 20=80(dec) measurement frequency = 80 Hz
byte 20=150(dec) measurement frequency = 150 Hz
byte 20=44(dec) measurement frequency = 300 Hz
byte 20=144(dec) measurement frequency = 400 Hz
NOTE: The date and time are expressed with a 32 bit integer containing the number of minutes elapsed
since 01-01-1992. To calculate the date starting from this number, see the programming examples in the
section 4.0 PROGRAMMING ALGORITMS of this manual.
INDEX Input = 31(dec) Slave Data
byte 0: (8 bits integer) current INDEX Input
byte 1: (8 bits integer) current INDEX Output
byte 2: (8 bits integer) slave address
byte 3: (8 bits integer) pno identification number high
byte 4: (8 bits integer) pno identification number low
byte 5: (8 bits integer) DPC31 ASIC Step
bit 0 =1 if DPC31 B
byte 6: (8 bits integer) MAC State Offline / Passive Idle
bit 0 =1 if the MAC is in Passive Idle
byte 7: (8 bits integer) watchdog state
bit 0-1 = 00 --> Baud Search
01
--> Baud Control
10 --> DP_Control
byte 8: (8 bits integer) baud rate
bit 0-3 = 0000 --> 12 MBd
0001
--> 6 MBd
0010 --> 3 MBd
0011 --> 1.5 MBd
0100 --> 500 kBd
0101 --> 187.5 kBd