Manual 35018V1
505XT Digital Control System for Steam Turbines
Woodward
143
Modbus Ethernet Link 3
ETHERNET Port 2 – IP Address =
<display only>
ETHERNET PROTOCOL
dflt= TCP (TCP, UDP port 5001)
Select TCP or UDP to determine the Ethernet communication protocol. Selecting UDP will use port
5002 for Link 3.
DEVICE ADDRESS
dflt= 2 (1, 247)
Enter the integer corresponding to the Modbus device number/address required.
ENABLE WRITE COMMANDS
dflt= NO (Yes/No)
Select YES to allow this Modbus link to write values to the control. If NO, it will be read only.
Analog Inputs Menu
No two analog inputs can be programmed for the same function. In addition, the function that the analog
input uses must be programmed or an error message will occur. For example, to use the Cascade Input,
the ‘Use Cascade’ function must be programmed.
ANALOG INPUT # 1
INPUT FUNCTION
(must choose from list)
Scroll through the menu by navigating the focus highlighter to the desired item, pressing ENTER,
using the Adjust Up/Down Arrows, and then pressing the ENTER key again to select the
option/function. Press the ESC key to cancel the selection.
See tables in chapter 1 for the list of functional options:
Many of the functions in this list are described in other sections of the manual containing the functional
description. Functions that are not described elsewhere in the manual or need clarification are described
as follows:
Inlet Steam Pressure – This can be configured as the input for a controller to control the inlet steam
header pressure or it must be used if the Inlet Pressure Compensation feature is used.
Exhaust Steam Pressure – This can be configured as the input for a controller to control the exhaust
steam header pressure.
4 mA VALUE (UNITS)
dflt= 0.0 (-1.0e+38, 1.0e+38)
Set the value (in engineering units) that corresponds to 4 milliamps (mA) on the analog input.
20 mA VALUE (UNITS)
dflt= 100 (-1.0e+38, 1.0e+38)
Set the value (in engineering units) that corresponds to 20 milliamps (mA) on the analog input.
(Must be greater than the ‘Input 4 mA Value’ Setting)
LOOP POWERED
dflt= NO (Yes/No)
Check this box if the 505 should provide loop power for the transmitter.
In previous 505 models, there were jumpers that determined it
this function was used or not. When upgrading the user will need
to remove the cover of the old 505 to determine the proper
setting for this option
DEVICE TAG
This is a user entered field. It allows entry of a short description or tag name for this channel.
UNITS
This is a user entered field. It allows entry of a unit label for this channel.
MDOBUS MULTIPLIER
dflt= 1.0 (0.01, 0.1, 1.0, 10, 100)
This is the multiplier that will be used for this parameter address on the 505 slave modbus
communication link
DECIMALS DISPLAYED
dflt= 1.0 (0, 1, 2, 3)
This is the number of decimals to be displayed on the 505 screens for this parameter
Analog Inputs # 2 through # 8 are configured following the same rules as described for Analog Input # 1.