Table of Contents
Advertisement
3. SPECIFICATIONS
3.3
Temperature/Digital Conversion Characteristics
3.4
Maximum Transmission Distance over the CC-Link System
Master
station
Downloaded from
ManualsNet.com
Since the thermal electromotive force has a non-linear characteristic, it must undergo the linearize
processing before being written in the remote register.
An example of detected temperature characteristic in respect to the thermocouple input value is shown
below.
(1200 °C) 12000
0
(0 °C)
0
(0 °C)
The maximum transmission distance over the CC-Link system is shown below.
1)
Regardless of the setting of the transmission speed, the cable length must be "greater than 2 m
(6.6 ft.)" long between a mater or local station, intelligent device station and the adjacent stations.
2)
For 5 Mbps and 10 Mbps transmission speeds, the maximum transmission distance will differ
according to the cable length between the remote I/O station and remote device station, so
exercise caution.
Remote I/O station
Remote I/O station
Remote device station
Remote device station
1)
2)
Transmission speed
156 kbps
625 kpbs
2.5 Mpbs
5 Mbps
10 Mbps
search engine
Thermocouple
output characteristic
Thermal
V
electromotive force
Local station
Local station
Standby master
Standby master
station
station
Intelligent device
Intelligent device
station
station
1)
1)
Maximum transmission distance
1)
30 cm (11.8 in.) or more
30 cm (11.8 in.) or more
30 cm (11.8 in.) or more
60 cm (23.6 in.) or more
2 m (6.6 ft.) or more
30 to 59 cm (11.8 to 23.2 in.)
60 to 99 cm (23.6 to 39 in.)
30 to 59 cm (11.8 to 23.2 in.)
3-4
The diagram at left is an example
of temperature conversion
characteristic example under
the conditions shown below:
Thermocouple used : JIS K type
Terminal block temperature : 0 [°C]
48828 [ µV ]
(1200 °C)
Remote I/O station
Remote device station
2)
Maximum transmission
2)
1200 m (3937 ft.)
600 m (1968.5 ft.)
200 m (656.2 ft.)
150 m (492.1 ft.)
110 m (360.9 ft.)
1 m (3.3 ft.) or more
100 m (328.1 ft.)
80 m (262.5 ft.)
50 m (164 ft.)
MELSEC-A
Remote I/O station
Remote device station
distance
Advertisement
Table of Contents
