t.a.c. MZ18L Manual page 4

DESCRIPTION OF USED SNVTS* AND SCPTS**
This table shows all used standard network variables and
standard configuration parameters, their default values, a
Standard Network
Variable
Mandatory Network Variables
nviActPos
Optional Network Variables
nvoActPosFb
0-003-1902-0 (GB)
Type Adjustment of the different functionalities and the explanation of the shown values.
{Range}
{factory settings}
Definition
SNVT_lev_percent nviActPos = 163.835 [INVALID]
After Power-on or Reset
{0...100 % ; 163.835} Controller is sending [INVALID].
The actuator will run to the safety position
defined in [nciDefaultOutput].
{163.835} = INVALID
Watchdog has "detected";
Only possible if the watchdog was selected in
[nciMaxRcvTime] and will correspond on the
made selection in [nciDefaultOutput].
The actuator will run to the safety position
defined in [nciDefaultOutput].
nviActPos = 0% or 100%
Synchronization with full running time + 30%.
The synchronization can be interrupted if new
values are received.
(excluding during synchronization after Power-
on or Reset)
0% < nviActPos < 100%
The actuator runs to the position received by
the controller.
(Exceptional case is after Power-on or Reset)
Definition
SNVT_lev_percent nvoActPosFb = 163.835 (INVALID)
{0...100 % ; 163.835} After Power-on or Reset.
{163.835} = INVALID No defined stroke position feedback possible.
0% <= nvoActPosFb <= 100%
The actual calculated position of the stem
according to the time to stroke model.
short description, the range and the send conditions and
service of the outputs.
4 (8)
Explanation
The actuating signal received from a
controller defined in the range of 0-
100% which defines the stroke
position of the connected valve.
Received values below 0% are
calculated like 0% and values over
100% will be calculated with 100%.
The only exception is the value
163.835 = [INVALID]. Is this value
received, the actuator drives to the
safety position which is defined in the
[nciDefaultOutput].
The received values will be never
overwritten by the software of the
actuator.
The variable [nviActPos] is only be
used, if the variable with higher priority
[nviManActPos] for manual operation
is set to [INVALID] = 163.835.
The cyclic received actuating signal
can be supervised. In this case, the
maximum time frame for the cyclic
received values can be defined in the
configuration parameter
[nciMaxRcvTime].
Is this time frame passed, the actuator
will be running to the safety position
defined in the configuration parameter
[nciDefaultOutput].
Explanation
This value shows the actual
calculated stem position