Mitsubishi has invented an original servo system network "SSCNET" in pursuit of reliability. SSCNET is an optical network that realizes smooth, high-response and high-accuracy operation under all circumstances.
* SSCNET (Servo System Controller NETwork)
Servo technology has been remarkably advanced. SSCNET realizes high-performance and high-accuracy devices that could not be attained with conventional pulse train command or analogue command.
There were problems with both pulse-train command and analogue command: former had a limited pulse frequency for a high-speed and high-accuracy control, and the latter was vulnerable to the line noise, voltage drop due to the cable length, and temperature drift.
SSCNET, however, resolves these problems and realizes smoother operations with high speed and accuracy. The high-speed serial communication system in SSCNET allows the servo motor synchronous control system and absolute-position system to be easily structured, and the one-touch connection with the connector simplifies wiring.
SSCNET can be connected only by inserting the dedicated cable into connectors. No more complicated wiring is necessary.
SSCNET offers a high degree of accuracy and communication reliability with its data communication. When an error occurs during communication, the current data is discarded and the following normal data is used.
Item | SSCNETIII/H | ||||
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Communication Medium | Optical Fiber Cable | ||||
Standard Cord for Inside Panel Standard Cable for Outside Panel |
Long-Distance Cable (Note-1) | ||||
Communication Speed | 150 Mbps | ||||
Communication Cycle (Note-2) | Send | 0.22 ms/0.44 ms/0.88 ms | |||
Receive | 0.22 ms/0.44 ms/0.88 ms | ||||
Maximum Control Axes per System | Communication Cycle 0.22 ms : 4
axes/system Communication Cycle 0.44 ms : 8 axes/system Communication Cycle 0.88 ms : 16 axes/system |
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Transmission Distance | Maximum 20 m between Stations Maximum Overall Distance 320 m (20 m x 16 axes) |
Maximum 50 m between Stations Maximum Overall Distance 800 m (50 m x 16 axes) |
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Noise Resistance | ◎ |
(Note-1) : Special-order product.
(Note-2) : Communication cycle differs according to the controller specifications.