t.a.c. MZ18L Manual page 2

FUNCTION
The movement of the electric actuator
is produced by a screw spindle which is
driven in both directions by a
synchronous motor through a set of
gears. A magnetic clutch limits the
torque of the gear assembly and the
driving force of the actuator.
The actuator is fixed to the valve body
by means of a coupling ring requiring
no tools for mounting.
The actuator is maintenance-free and
supplied completely with a ready-to-
wire connecting cable.
MMI DESCRIPTION
Service LED: Defined by Echelon firmware in the neuron
chip (see table 1)
Status LED: Is blinking if wink was sent and indicates
reverse or direct acting (see table 2 and
diagram 1)
Service PIN: Accessible under the cover and will be
used to send the neuron ID over the
network during the installation.
Node state hF01F
Service LED Status
Applicationless and
unconfigured
Unconfigured
(but with an
application)
Configured,
Hard Off-line
Configured
Table 1. Service LED
Status LED Blink Modes
Mode 1 1 s on, 1 s off, for 10 times - if a
wink message was received
Mode 2 4 s on, 1 s off - direct acting and
normal operation
Mode 3 4 s off, 1 s on - reverse acting and
normal operation
Mode 4 continuously off - the device is in
the offline-mode
Table 2. Status LED
0-003-1902-0 (GB)
The movement of the actuator stem
(Fig. 1) indicates whether the valve is
opening or closing.
If the direction of travel is not correct,
the configuration parameter nciDirRev
(SNVT-state) can be used for changing
the direction of action.
A functional check of the valve actuator
can be carried out by changing the
nviManActPos (SNVT_lev_percent).
Service Pulse rate
LED (Hz)
code
3 on
2 Flashing 0.51
6 off
4 off
A
A
A
B
76
Selecting valve type and output signal.
—
—
Mode 1
on
off
1
Mode 2
on
Direct
off
1
Mode 3
on
Reverse
off
1
Mode 4
on
off
1
Diagram 1. Status LED
2 (8)
17.8 mm
B
B
AB
2 3 4 5 6 7 8
2 3 4 5 6 7 8
2 3 4 5 6 7 8
2 3 4 5 6 7 8
11.7 mm
Fig. 1
Fig. 2
9 10 n Time [s]
9 10 n Time [s]
9 10 n Time [s]
9 10 n Time [s]