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Chapter 1 Network Configuration

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1.1 Communication port for CPU module

EHV-CPU is equipped with USB communication port, Serial communication port, and Ethernet communication port.

The personal computer can be connected to every port, and you can create programs and monitor the system by using

Control Editor which is a programming software.

USB communication port

Serial communication port

Ethernet communication port

USB communication port

It is a maintenance port for programming software.

Programming software can be used, connecting a notebook which is no

equipped with a RS-232C serial port.

Serial communication port

RS-232C/422/485 can be switched like CPU currently in use.

Supports a dedicated procedure and a general-purpose communication.

Ethernet communication port

It has functions equivalent to the Ethernet communication module (4

dedicated procedure connections and 6 message communications). Suppor

to network can be realized by the CPU module by oneself.

Figure 1.2 Communication ports for EHV-CPU

Caution

Please pay attention the following points on the communication port.

(1) If the Ethernet communication cable is connected to the serial communication port, the Ethernet communication

port of the CPU module and external equipments connected to the Ethernet communication port may be

damaged.

(2) A link with a network HUB etc. may not be established on the high speed communication by 100BASE-TX

connection (100Mbps) or the link may be easy to cut because communication error occurs under the influence of

installation environment, cable length, and noise. In these cases, please construct the network system with the

following solutions.

(a) Increases the number of times to retry if necessary, using the TCP/IP communication for the protocol to

communicate to other unit.

(b) Change the Ethernet communication speed to 10Mbps.

(3) If the programming tool and the USB communication port are used for connection, the programming tool may

generate communication error under noise environment. If communication error is generated under noise

environment, the serial port or the LAN port should be used for connection. And do not bring a communication

cable close to other wiring and do not put the communication cable and the wiring into the same duct for the

stable communication.

Reference

Since the Ethernet communication speed can be changed in Ver.x107 or newer, 5 types of communication speed

(Auto-negotiation, 100M full-duplex/half-duplex, 10M full/duplex/half-duplex) can be set. The communication speed

is set to 10M half-duplex at the shipment. (As for “x” in Ver.x107, it represents EHV-CPU128 when x is 0, it

represents EHV-CPU64 when x is 1, it represents EHV-CPU32 when x is 2, and it represents EHV-CPU16 when x is

3. This version information is stored in the special internal output WRF050.)

Control Editor (Ver.2.00 or newer) or IP address setting tool can change the communication speed.

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