Contec RP-COM(FIT)H, Руководство пользователя

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3. Explanation in Mode of Operation
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RP-COM(FIT)H, RP-COM(FIT)H-AF
Through Mode
In this mode, data is transferred without any change from a connected device.
A serial cable used for one-to-one connection of devices can be converted to Ethernet connection
without any changes. In this way, two units must be installed as a pair for the product and stacked
add-on device module*1. Up to 254 pairs can be installed on a single circuit. However,
communication is not possible between devices connected to the product and its stacked add-on device
module.
Existing applications that operate using RS-232C (or RS-422A/485 : when expanding
COM-1PD(FIT)GY) can continue to be used without any changes.
The Device ID is set by the rotary switch on the main unit or the setup utility. For the rotary switch,
the same value is set to the Device ID. For the setup utility, the device ID of the party on the other side
of the connection (other party’s Device ID) can be set.
It is also necessary to match the serial parameters of the serial devices to be connected to the product
and its stacked add-on device module by using the setup utility.
For information about how to use the setup utility, refer to the Help section on the attached CD-ROM.
*1 RS-232C 2ch communication module : COM-2(FIT)GY
Isolated RS-422A/RS-485 1ch communication module : COM-1PD(FIT)GY
CAUTION
- If using broadcasting, ensure that all RP-COM(FIT)H (or RP-COM(FIT)H-AF) units have different
device IDs.
- Device ID 255 is reserved for broadcast use.
- To avoid any adverse effects on other LAN devices, set the IP address, subnet mask, and other
network parameters to appropriate values.
- Although, existing application can generally continue to be used unchanged, note that they may not
operate correctly if particular RS-232C control procedures are used (see below).
(Example) - Baud rate changed during operation
- Hardware signals used for proprietary purposes other than flow control
- RI signal used
- When COM-1PD(FIT)GY is stacked with RP-COM(FIT)H or RP-COM(FIT)H-AF, half duplex
communication is disabled.