Mitsubishi FX3U-20SSC-H - 3.2 Power Supply Specification; 3.3 Performance Specification

1 Introduction
1.1 Outline
17
FX3U-20SSC-H Positioning Block User's Manual
1
Introduction
2
System configuration
3
Exmample Connection
4
Installation
5
Wiring
6
Memory configuration and data
7
Before starting positioning control
8
Manual control
9
Positioning Control
10
Table Operation
1. Introduction
1.1 Outline
The FX3U-20SSC-H type positioning block (hereinafter referred to as 20SSC-H) is a special function block
applicable to SSCNET III.
20SSC-H can perform positioning control by servo motor via an SSCNET III applied servo amplifier.
1. 2-axis control is possible
One 20SSC-H controls 2 axes.
20SSC-H applies the 1-speed positioning and interrupt 1-speed constant quantity feed operations for
constant quantity feed control, and also the linear interpolation and circular interpolation operations.
→ For positioning control, refer to Chapter 9
2. Connection to servo amplifier by SSCNET III is possible
• The 20SSC-H connects directly to the MELSERVO (our company's servo amplifier: MR-J3- B, MR-J3W-
B
*1
, MR-J3- BS
*2
) via SSCNET III.
*1. The MR-J3W- B can be connected within the functional range of the MR-J3- B.
*2. The MR-J3- BS can be connected to the 20SSC-H later than Ver.1.40.
However, it does not support the fully closed loop system.
• Connection using the SSCNET III cable between the 20SSC-H and the servo amplifier reduces wiring.
(Maximum length is 50m.)
• With SSCNET III cables (optical communication), connections are less susceptible to electromagnetic
noise, etc. from the servo amplifier.
• Setting the servo parameters on the 20SSC-H side and writing/reading the servo parameters to/from the
servo amplifier using SSCNET III is possible.
• Current values and error descriptions from the servo amplifier can be checked with the buffer memories of
the 20SSC-H.
3. Easy application of absolute position detection system
• The servo amplifier with absolute position detection enables the absolute positioning detection system.
• Once the zero position is established, the zero return operation at power startup is not necessary.
• The absolute position system allows establishment of the zero position by the data set type zero return.
In this case, wiring for near-point DOG, etc. is not required.
4. Easy maintenance
Various data such as positioning data, parameters, etc. can be saved to the flash memory (ROM) in the
20SSC-H.
This allows the data to be saved without a battery.
5. Connectable PLC
• The connected FX3U or FX3UC PLC reads/writes the positioning data from/to the 20SSC-H.
• For connection to the FX3UC PLC, the FX2NC-CNV-IF or FX3UC-1PS-5V is needed.