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CTI 2572 Installation and Operation Guide
16
Serial Port Baud Rate
You can individually set the baud rate settings for each serial port. For most applications, a baud rate
of 9600 provides a good balance between performance and reliability.
Port 1 Hardware Handshaking
Hardware handshaking for port 1 can be disabled or to enabled via a switch on Switchblock SW1. If
hardware handshaking is enabled, the attached device must raise CTS before the 2572 will transmit
data. See the diagram below. The switches on some modules may be labeled O
PEN and CLOSED.
The C
LOSED position is equivalent to ON.
NOTE:
Unless the device you are attaching explicitly requires hardware handshaking, you should leave
hardware handshaking disabled.
DataShare
Switch 3 on Switchblock 2 (SW2) enables the DataShare Protocol. When this is enabled, other
protocol functions are significantly restricted. See CHAPTER 6. DATASHARE P.
Network Startup Options
Switch 4 on Switchblock SW2 allows you to select how the 2572 starts up the PLC Network Server
function. If you set the switch to PLC S
TART, then the 2572 will wait for the PLC to issue a Start
Network Server command (see Section 2.6, page 19). The command block for this command
contains the network parameters (including IP address).
If you set the switch to the AUTOSTART position, then the 2572 will automatically start the Network
Server function, obtaining the network data from EEPROM on the 2572. The switches on some
modules may be labeled O
PEN and CLOSED. The CLOSED position is equivalent to ON.
Before you can use the AUTOSTART option you must store your network data in EEPROM. You can
use either PLC logic or a serially attached PC with a CTI supplied program to write the EEPROM.
The data will remain stored in EEPROM until changed. See page 25 for information on writing
EEPROM. The IP address stored in the EEPROM has purposely been set to an invalid IP address at
the factory.
Unless you have a significant reason to do otherwise, you should set the switch to PLC START and
use PLC logic to start the Network Server. Then, if you swap out a module, the PLC will
automatically load the new module with the correct IP address information and other network
parameters. If you choose the A
UTOSTART option, your maintenance procedures should guard
against inadvertent module swaps, since the IP address will move with the module.