Com Port - Delta Electronics AH500 Operation Manual

In the setting page below, the range of latched data registers is D0~D32768. The number of latched data
registers is 32769. When users leave this page, the PLC Parameter Setting dialog box appears.
*. The parameters set in HWCONFIG must be downloaded to the CPU module so that they can take effect. (Please
refer to section 8.2.6 or section 8.4.4 for more information.)

8.2.3 COM Port

After users click the COM Port tab at the top of the window, they can set the communication ports in the CPU
module. If the CPU module is equipped with two communication ports, there are two setting areas for the two
communication ports, and the two communication ports are set individually. (AHCPU5xx-RS2 is equipped with
two communication ports.)
Please refer to section 2.4.7 in ISPSoft User Manual for more information about connecting to a CPU module
through a communication port.

Users can select RS232, RS485, or RS422 in the Communication Type drop-down list box.

Users can select a communication speed in the Baud Rate drop-down list box. If a RS-232 cable is used,
the communication speed can be 9600 bps, 19200 bps, 38400 bps, 57600 bps, 115200 bps. If a RS-485
cable or a RS-422 cable is used, the communication speed can be 9600 bps, 19200 bps, 38400 bps, 57600
bps, 115200 bps, 230400 bps, 460800 bps, or 921600 bps.

Users can set the communication protocol parameters. If the RTU option button is selected in the Transfer
Mode section, the 8 bit option button in the Data Length section is automatically selected.

Users can set a station address. A device on a network can be identified by means of the station address of
the device. The station address of a device on a network can not be the same as the station address of
another device on the same network. The station address of a device must be in the range of 0 to 247.
If the communication port functions as a slave, and there are other slaves, the station address of the
communication port can not be 0. Station address 0 has the meaning of broadcasting to all slaves in a
communication protocol. If a master specifies in a data packet that data must be sent to station address 0,
the data will be sent to all slaves. No matter what station address of these slaves are, these slaves will
receive the data packet.
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C h a p t e r 8 H a r d wa r e C o n f i g u r a t i o n