Woodward 2301E-HT, Руководство по эксплуатации продукта

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Manual 35092 2301E-HT Hydro (Francis Turbines)
Woodward 16
Communications
Control Input
When a discrete input is configured to “Local / Remote” the start and
stop commands can be issued from Modbus 1 when in local mode or
from Modbus 2 or discrete input when in remote mode. When in
remote mode it is not possible to assure if the command came from
Modbus 2 or discrete input.
The cont
rol’s two serial communication ports are used to configure and service the unit. These ports are
on a common return and are isolated ports.
The RS-232 serial communication service port communicates using the Control Assistant (Servlink)
software. It can also be used as a Modbus RTU port. To change the port from Servlink to Modbus the
command is issued in the menu “25 MODBUS” parameter “CHOOSE MODBUS COMM.” At this moment
you will lose the communication with Servlink and the port will be ready to use Modbus communication.
To change back from Modbus to Servlink you should send the command in the address 17 of the Modbus
list. If the control is in Local mode the command needs to be sent from port 2 (RS-422): if the control is in
remote mode the command needs to be sent from port 1 (RS-232).
The RS-422 serial communication port communicates using a Modbus RTU protocol, functioning as a
Modbus Slave device, via a RS-422 driver. The 2301E-HT can be fully operated and many values
monitored via Modbus communications.
The proper connection for RS-232 and RS-422 can be found in the 2301E hardware manual.
The communication ports must be connected with an approved
jacketed serial communication cable. The connector must be
secured to the 2301E-HT to prevent contact with other circuits.
There is also a CAN port available for I/O expansion with an AIO (8 AI and 2 AO) LINKnet HT module.
2301E-HT Functions
Commissioning
While working on the 2301E-HT and turbine area, make sure
personnel are following Lock Out Tag Out procedures set by the
facility.
During commissioning/troubleshooting if speed = 0 the actuator
position (Gate valve) can be overridden to a manual position from the
PC interface.
In application we can select Local/Remote command from digital
inputs or communication command.
For troubleshooting, connect to 2301E-HT on DB9 connector inside
the cabinet with the service tool. Make sure area is free from hazards
as it is indeterminate whether the PLC or the local operator has
control of the turbine.
The functions of the 2301E-HT speed control for Francis turbines are described in detail in this section.
The values that are in “quotes” can be configured for the specific application. Configuration of these
values is discussed in greater detail in this manual.
Start, Stop and Gate Limit
When the 2301E-HT control is given a start command, the control resets itself and pauses for 4 to 5
seconds. This allows time for the alarms and shutdown conditions to clear. Once all shutdowns have
Released