Mitsubishi Electric Q12DCCPU-V - Hub; RS-232 Cable

2
SYSTEM CONFIGURATION
2.4 Applicable Devices
2 - 27
1
OVERVIEW
2
SYSTEM CONFIGURATION
3
SPECIFICATIONS
4
FUNCTIONS
5
ACCESS VIA NETWORK MODULES
6
PREPARATORY PROCEDURES AND SETTING
7
I/O NUMBER ASSIGNMENT
8
MEMORIES AND FILES
(3) Hub
The C Controller module discriminates between 10BASE-T and 100BASE-TX and
between full-duplex and half-duplex communication modes according to the hub.
When connecting a hub that does not have the auto negotiation function, set the hub
to the half-duplex communication mode.
(a) For the Q12DCCPU-V
CH1 and CH2 of the C Controller module are assigned to different sub-networks.
Do not connect CH1 and CH2 of the C Controller module to the same hub
(excluding switching hubs).
(4) RS-232 cable
Use an RS-232-compliant cable that is 15m (49.21 feet) or less in length.
[Recommended cable]
7/0.127 P HRV-SV ••• Specify the number of pairs in (For 13 pairs, use 7/0.127
13P HRV-SV.) (Oki Electric Cable Company, Limited)
POINT
In RS-232 connection, a communication error may occur due to noise generated
from the devices other than the C Controller system depending on the installation
environment.
In the environment where the system is susceptible to noise, include the retry
processing in the user program.