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New "Sercos II" transmission board
3.1
New Sercos power table
SERPOWSE (P121)
It sets the Sercos power or the intensity of the light going through the
optical fiber. Its value depends on the total length of the cable being
used. Set it with the same value used by the drives.
Assigning other values, for example a value 4 for a length of 3 m, may
cause communication errors due to signal distortion in the optical
fiber.
Recommended values (Sercos II board).
1
For lengths under 15 meters.
2
For lengths between 15 and 30 meters.
3
For lengths between 30 and 45 meters.
4
For lengths over 45 meters.
3.2
Set the transmission delay at the bus for transmissions at 8 Mhz
and 16 Mhz
SERCDEL1 (P178)
It may be used to set the Sercos transmission delay. The default delay
is 400
µ
s and this parameter may be used to set a delay of 600
µ
s.
Setting a longer delay at the bus permits increasing the amount of data
going through the fast channel of the bus. This may be necessary, for
example, when having set many PLC parameters (SRR700 to
SRR739) that define the fast channel or when accessing variables of
several drives from the oscilloscope.
In any case, if the CNC detects a limit situation in the bus capacity, it
will show a message suggesting to increase this parameter.
When changing the parameter value from 0 (400) to 600 on a machine
using the fine adjustment, i.e. with "zero following error", we
recommend to slightly increase the value of the DERGAIN parameter
(when ACFGAIN = YES) to compensate for the 200 microsecond
delay.
SERCDEL2 (P179)
Not being used.
Possible values:
From 1 to 6.
By default:
4.
Possible values:
0 / 400 / 600 microseconds.
By default:
0 (equivalent to a delay of 400
µ
s.)
The 0 value (400
µ
s) is compatible with all versions except V9.11,
V10.11, V9.12 and V10.12. When updating the software from one of
these versions to a V9.13 or V10.13, the value of SERCDEL1 must be
set to 600.
Содержание CNC 8055
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