Communications Lost Position (Register 13); Slow Mode Range (Register 15); Valve Jammed Time (Register 16) - rotork Modbus IQ Pro Technical Manual

Modbus MFU Option Card Installation Manual
The following examples show how the Auxiliary Input Mask settings can be applied.
Most Significant Bit
Bit 7
7
X
Enable
DI-4
ESD
Example 1 0
Example 2 1
Example 3 0

Example 1

Example 2

Example 3
8.1.6

Communications Lost Position (Register 13)

The setting in this parameter register determines the position in the range 0 to 100% that the actuator
will move to if the Modbus network communications stops being received, provided the Fault Mode
(Register 1) is set to 'Position'. No action will be taken unless the communications stops for a period
equal or greater than the setting in the Communications Fault Timer (Register 21).
8.1.7

Slow Mode Range (Register 15)

This parameter register is only applicable to IQT actuators. The Slow Mode Range sets the deviation
between the setpoint and current position in positioning mode inside which the actuator motor will slow
to minimum speed.
If the setpoint (DV) is 50% and the setting for this parameter is 10%, then when the actuator moves
within the range 40% to 60% the motor will adopt low speed. The actuator does not use slow mode for
digital (Open/Close) commands.
8.1.8

Valve Jammed Time (Register 16)

Parameter register 16 sets the time delay that must elapse without any actuator movement before
deciding the Valve Jammed status bit must be set. Valve Jammed is only announced if the actuator is
asked to move and fails to respond when it should. The time must be long enough to ensure that the
valve is not moving at all.
60 of 76
Bit 6 Bit 5
6 5
X X
Enable Enable
DI-3 DI-2
Stop Close
0 0
1 1
0 0
The default value of '15' (0000,1111 binary or 0F hex) makes all 4
inputs report closed contacts as true (1) and none of the inputs will
operate the actuator.
The value 255 (1111,1111 binary or FF hex) makes all 4 inputs report
closed contacts as true (1) and all the inputs control the actuator in
their predefined way.
The value 0 (0000,0000 binary or 00 hex) makes all 4 inputs report
open contacts as true (1) and none of the inputs will operate the
actuator.
Publication PUB091-003-00_0119
Bit 4 Bit 3
4 3
X Y
Enable
Invert
DI-1
DI-4
Open
0 1
1 1
0 0
Least Significant Bit
Bit 2 Bit 1
2 1
Y Y
Invert Invert
DI-3 DI-2
1 1
1 1
0 0
Bit 0
0
Y
Invert
DI-1
1
1
0