Discrete Input Function Block (Di1 Fb + Di2 Fb) - Samson 3730-5 Configuration Manual

Block model
7.4.3

Discrete Input Function Block (DI1 FB + DI2 FB)

The DI Function Block processes single discrete signals and provides them to other function
blocks over the OUT_D parameter. The positioner has two DI Function Blocks which provide
the options listed in following. The application type is set over the SELECT_DI_1...2 parame-
ters of the Resource Block.
− 5 – 30 VDC (DI1)
As a standard feature, the positioner comes with a contact input to analyze binary volt-
age signals (terminals 87 and 88). The DI1 Function Block analyzes the state of the con-
tact and issues it over OUT_D.
− Floating contact (DI2)
The positioner can be fitted with an optional binary input to analyze a floating contact
(terminals 85 and 86). The DI2 Function Block analyzes the state of the contact and issues
it over OUT_D.
When a pressure sensor (leakage sensor) is connected, its switching state can be issued
as a diagnostic alarm in the XD_ERROR_EXT parameter of the AO Transducer Block and
logged. In this case, the 'Actively Open – Ext. Leak. Sens.' or 'Actively Closed – Ext.
Leak. Sens.' option must be activated in CONFIG_BINARY_INPUT2. Additionally, the
switching state of the binary input is issued in the BINARY_INPUT2 parameter of the AO
Transducer Block.
− Int. solenoid valve (DI1, DI2)
In this setting, the current switching state of the optional internal solenoid valve is ana-
lyzed and issued over OUT_D. '0' indicates a de-energized solenoid valve (U <
15 V DC) and '1' an energized solenoid valve (U > 19 V DC).
− Discr. final valve position (DI1, DI2)
In this setting, the current discrete valve position is issued over OUT_D. The values are as-
signed as follows:
0 Device not initialized
1 Valve closed
2 Valve open
3 Valve in intermediate position
24 KH 8384-5 EN