·182·
Installation manual
CNC 8055
CNC 8055i
6.
MACHINE PARAMETERS
SOFT: V02.2X
General machine parameters
SERSPEED (P120)
It sets the Sercos transmission speed. Regardless of the baudrate used, always respect the values
recommended by SERPOWSE.
SERPOWSE (P121)
It sets the Sercos power or the intensity of the light going through the optical fiber. Its value depends
on the length of the cable used from the OUT connection of the Sercos board of the CNC to the
IN connection of the Sercos board of the drive.
Possible values (Sercos board).
Assigning other values, for example value 4 for 3 m, causes communications errors due to signal
distortion in the optical fiber.
Possible values (Sercos816 board).
Assigning other values, for example value 4 for 17 m, causes communications errors due to signal
distortion in the optical fiber.
Value Meaning
0 4 Mbit/s.
1 2 Mbit/s.
8 8 Mbit/s
16 16 Mbit/s
80 Sercos test. Continuous signal mode.
81 Sercos test. Zero bit stream mode at 2 Mbit/s.
91 Sercos test. Zero bit stream mode at 4 Mbit/s.
Default value: 0
Sercos communication at 8 MHz and 16 MHz requires servo drive version V6.05 or higher.
Value Cable length
2 Less than 7 meters.
4 From 7 to 15 meters.
6 More than 15 meters.
Default value: 0
Value Meaning Recommended type of cable
1, 2, 3, 4 Less than 15 meters. SFO / SFO-FLEX
5, 6 From 15 to 30 meters. SFO-FLEX
7 From 30 to 40 meters. SFO-FLEX
8 More than 40 meters. SFO-V-FLEX
Default value: 2
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