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3.6 Transmission Between Drives
Using the common memory of the TOSLINE-S20, it is possible to transmit data between drives. The following
describes typical operation examples.
(1) Master/slave
If one machine is driven by two units (two motors), one is determined as master and the other as slave.
Master: Speed
control
Slave:
Torque control (Torque reference is input from the master.)
(2) Load balance
The operation is controlled so that two units are balanced. According to the signals from both units, the
speed of a unit, to which a larger load is applied, is reduced to ensure balanced operation.
3.7 Motor Temperature Detection Circuit (TMdrive-30)
(1) Platinum temperature sensor (ST-3A type, 1 k
Ω
)
The figure below shows the motor temperature detection circuit. The motor temperature is detected by the
platinum temperature sensor (platinum resistor) installed inside the motor. The voltage signal sent from the
platinum temperature sensor, which is read through the external terminal circuit board, is converted into a
digital value by the special A/D converter. This digital value is used to protect the motor from being
overheated, compensate variations in secondary resistance of the motor (R2 compensation: optional)
caused by temperature change, and provide the motor temperature data to external units (through the
optical transmission).
When an RTD unit is not used, the resistance of the platinum temperature sensor is approximately 1 k
Ω
.
(2) RTD unit
If a platinum resistor sensor (100
Ω
) is used as temperature sensor, it is absolutely necessary to mount a
RDT unit (optional).
Since the working voltage range of the motor temperature detection circuit is 0 to 5V, the temperature
detection range of the RTD unit must be set so that the assumed temperature range is included in the
working voltage range.
The recommended RTD unit is listed as an optional device (Weidmüller WTS4 PT100/3V).
TB2-3
TB2-4
ARND-3120
ST-3A temperature sensor approx. 1k
Ω
(1)
(2)
A/D
ARND-3110
Weidmüller
WTS4 PT100/3V
(output 0 to 10V)
RTD
PT
Temperature
sensor 100
Ω
Recommended
RTD unit
(optional)
Zero setting
Minimum temperature: 0
°
C
Span: 360 to 540
°
C
(Factory setting is 450
°
C)
Jumper setting
Used voltage range: 0 to 5V (0 to 225
°
C)
RTD unit Switch setting pattern
1 2 3 4 5 6
Minimum temperature: 0
°
C
Span: 360 to 540
°
C
Drive Parameter:$MTMP_RTD_MAX=225
Fig. 3.7.1 Motor Temperature Detection Circuit
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