Woodward 2301E, Инструкция по установке и эксплуатации, Страница: 30 / 182

2301E Digital Control Manual 26641
20 Woodward
Load Generator (Terminal 40)
(Discrete Input G)
The input switch or relay contact used to activate the Load Generator command
connects to terminal 40. This discrete input will cause the Load Control Function
to ramp to a distinct mode of
operation. If the state of the input is “TRUE”, the
Load Control Function will increase or decrease in order to achieve either
Isochronous Load Sharing or Base Load operation. If the state of the input is
“FALSE” (input switch or relay contact open), the Load Control Function will
increase or decrease in order to achieve the Unload trip level. The CB Aux/Droop
Contact discrete input must be “TRUE” for the Load Generator input to affect the
control. Note: When using the 2301E in a single engine, emergency standby
application, this input must be “True”. The logic function of this input can be
modified to be normally open or normally closed.
Base Load (Terminal 41)
(Discrete Input H)
The input switch or relay contact used to activate the Base Load command
connects to terminal 41. This discrete input will cause the Load Control Function
to operate in Base Load. In this mode of operation the governor will control the
load on the generator. The utility (main) bus or an isochronous generator set
must control the bus frequency while in Base Load operation. With the state of
this input “TRUE”, isochronous load sharing with other units is disabled. With the
state of this contact “FALSE”, isochronous load sharing with other units can
occur. The CB Aux/Droop Contact di
screte input must be “TRUE” for the Base
Load input to affect the control. The logic function of this input can be modified to
be normally open or normally closed. The Raise / Lower Discrete Inputs are used
to set the Internal Baseload Setpoint. Closing both Raise / Lower Discrete Input
will allow the Baseload Setpoint to be controlled by an Analog Input.
Actuator Output (Terminals 13
–15)
The actuator wires connect to terminals 13(+) and 14(
–). Use shielded wires with
the shield connected to terminal 15 (chassis). Do not connect the shield to the
actuator or any other point. The shield must have continuity the entire distance to
the actuator, and must be insulated from all other conducting surfaces. Refer to
the manuals listed in the “References” table for additional information on actuator
installation.
The current range to the actuator output is configured in software for a
0
–200 mA, 4-20 mA, 0–20 mA or Pulse Width Modulation (PWM) type of
actuators. When the Actuator selection is set to PWM, the output is physically
switched to Discrete Output #1 on terminal 44 (See the Relay Driver Output
section for wiring details). The software configuration also allows for selection of
Forward or Reverse acting actuator. The actuator output can also be connected
to two actuators for applications consisting of two engines tied together with a
common generator. This tandem application is not very common.
Analog Inputs (Terminals 19
–24)
Both Analog Inputs can be configured for several different functions depending
on the application needs. No connection is required to this input if this function is
not needed by the application, set the function to 1 (not used).