03.2010 Communication / CBC
Siemens AG 6SE7087-6QX70 (Version AL)
SIMOVERT MASTERDRIVES Compendium Motion Control 8.4-43
P721 (CB parameter 11) P706 (CB parameter 11)
Special CAN bus settings
This parameter is only present in MASTERDRIVES units from the following
software versions onwards:
MASTERDRIVES Software version
SIMOVERT MASTERDRIVES MC
≥ 1.0
SIMOVERT MASTERDRIVES FC
≥ 1.3
SIMOVERT MASTERDRIVES VC
≥ 1.3
SIMOVERT MASTERDRIVES SC
≥ 1.2
SIMOVERT MASTERDRIVES E/R
≥ 3.1
SIMOVERT MASTERDRIVES AFE
≥ 1.0
• Index i001: With this parameter, different CAN profiles can be set in
future. At the present time, only the value 0 (pre-assigned) is valid.
• Index i002: With this parameter, the bus timing on the CAN bus can be
influenced. With the value 0 (pre-assigned), the internal setting resulting
from the baud rate is made. All other values are directly set without a
plausibility check.
This parameter should generally be allowed to keep its pre-assigned setting
of 0!
Meaning of the parameter-value bits:
Bit0 - Bit5: BRP (Baud rate prescaler).
Bit6 - Bit7: SJW SJW (Synchronization Jump Width). Maximum shortening
or lengthening of a bit time by means of resynchronization.
Bit8 - Bit11: TSEG1 (Time Segment 1). Time intervals before the scanning
time. Valid values are 2 to 15.
Bit12 - Bit14: TSEG2 (Time Segment 2). Time interval after the scanning time.
Valid values are 1 to 7. In addition TSEG2 must be greater than
SJW.
Bit 15: Not assigned
Internal standard pre-assignments of the bus timing, depending on the baud
rate:
Baud rate BRP SJW TSEG1 TSEG2 Hex
value
10 kBit (P720/P705 = 0) 39 2 15 2 2FA7
20 kBit (P720/P705 = 1) 19 2 15 2 2F93
50 kBit (P720/P705 = 2) 7 2 15 2 2F87
100 kBit (P720/P705 = 3) 3 2 15 2 2F83
125 kBit (P720/P705 = 4) 3 1 12 1 1C43
250 kBit (P720/P705 = 5) 1 1 12 1 1C41
500 kBit (P720/P705 = 6) 0 1 12 1 1C40
800 kBit (P720/P705 = 7) 0 1 6 1 1640
1 MBit (P720/P706 = 8) 0 1 4 1 1440
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