Flowserve 400MD Logix - Manual (Page 27)

Table 6.1 Write Protect dip Switch Settings
To Set the Dip Switch to:
Enable read and write access to the device’s configuration. (Factory-set
default)
Off position on the dip switch.
Off On
Enable read only access to device’s configuration. (Write-protect) On position on the dip switch.*
Off On
Enabling Write Protect Feature
The write-protect feature is activated only when the HARD_W_LOCK option is set in the FEATURE_SEL parameter. Once the bit is set and W/R
DIP switch is in R position, the device will remain write-protected until the device is powered down and the DIP switch is placed in the off
position. See Table 6.2 for truth table.
Table 6.2 Write-protect Feature Truth Table
When the Write-protect dip switch
main PCB cover is set to: ... and the FEATURE_SEL HARD_W_LOCK option is set to:
0 (No)
1 (Yes)
Off position Write-protect Disabled Write Protect Dis-
abled
On position Write-protect Disabled Write Protect
Enabled
6.6 Simulation Dip Switch
Simulation dip switch
A simulation parameter in the AO block is used to aid in system ‘debug’ if the process is not running. A hardware dip switch is provided to enable or disable
the simulate parameter. See Section 10.8 for details on setting the simulation dip switch. (See Figure 10.1.)
6.7 Establishing Communications
Starting Communications
Once the Logix 3400MD digital positioner is connected to the fieldbus network and powered up, the user is ready to start communicating with
the device.
The procedure in Table 6.3 outlines the steps to initiate communications with a Logix 3400MD digital positioner using the NI-FBUS Configura-
tor.
Table 6.3 Starting Communications with Logix 3400MD Digital Positioner
Step Action
1. Check that the fieldbus is powered up.
Verify that the power supply is on and connected with the proper polarity. See Table 4.2, Logix
3400MD Digital Positioner Power Requirements for proper voltage levels.
2. Verify that the operator interface is loaded with the NI-
FBUS Configurator or other configuration application.
Start the application on the computer.
3. View the active devices connected to the network.
Start the NI-FBUS fieldbus driver and Configurator. NOTE: Network guidelines as out lined in AG-
181 have been followed
4. Access the Logix 3400MD digital positioner’s blocks
and parameters.
Start the NI-FBUS Configurator application.
Tag Name Assignments
If device or block tags have not been assigned to a device, the NI-FBUS Configurator will automati cally assign a default device tag name. This
is done so that the devices are visible on the network. The user can then change tag names according to the process requirements.
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
27