Flowserve 400MD Logix - Manual (Page 88)

Table 10.10 Setting the Simulation Dip Switch
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 Simulation Mode
The SIMULATE parameter is enabled by setting the hardware simulation jumper to the Y position.
Additionally, AO block SIMULATE parameter must be set to the following values: SIMULATE
STATUS = Good: :[alarm status]: constant (suggested setting)
SIMULATE_VALUE = (supplied by user) used as the readback input to the AO block.
ENABLE_DISABLE = Active enabled
Simulation Mode Truth Table
The truth table in Table 10.11 shows the states of the simulation jumper and SIMULATE parameter to activate the simulation mode.
Table 10.11 Simulation Mode Truth Table
When the Simulation Dip Switch
on main PCB cover is set to: . .. and the SIMULATE Enable_Disable is set to:
1 (Disabled) 2 (Active)
Off Position Simulation Disabled Simulation Disabled
On Position Simulation Disabled Simulation Active
Simulation Mode A simulation mode is available in the AO function block to set the value and status of READBACK when it is necessary to
override the transducer value or status.
The SIMULATE parameter contains the following elements:
• SIMULATE_VALUE Contains the value that is copied to the READBACK parameter.
• SIMULATE_STATUS Contains the status that is copied to the READBACK parameter.
• TRANSDUCER_VALUE Contains the value read from the transducer position source.
• TRANSDUCER_STATUS Contains the status read from the transducer position source.
• ENABLE_DISABLE Enables simulation of the SIMULATE_VALUE and SIMULATE_STATUS when selected.
Enabling Simulation
Before the ENABLE_DISABLE in the SIMULATE parameter may be selected, the hardware simulation must be enabled for the device.
To enable simulation in the device, set the SIMULATE dip switch to the “On” position, select RESTART_PROCESSOR in the Resource block
RESTART parameter.
To ensure that simulate is permitted in the device, go to the Resource Block and read the BLOCK_ ERR parameter. It should indicate Simula-
tion Enabled.
Simulating the Transducer
To simulate the READBACK parameter, set the SIMULATE parameter as follows:
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
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