ATR 421 - User manual 33
9.2 Master and remote setpoint
ATR421-12ABC-T includes a simpli ed Master mode allowing operation with
other programmers ATR421-12ABC-T or with controllers ATR401-22ABC-T.
Setting
mstr on parameter 77 rem .s . controller transmits in broadcast (ad-
dress 0) its status (start/stop) and the control setpoint.
Following table shows all data:
Modbus Address Description
5000
Controllers status:
0 = Controller in stop
1 = Controller during initial waiting
2 = Controller in start
5001 Setpoint remote
Setting sLue on parameter 77 rem .s. controller is normally in stop mode; it
goes in start when the master device on the serial line starts a cycle.
10 Con guration for installer
To accede con guration parameters it is necessary to Stop the controller.
Press Display Do
1
PRG
M
Red display shows cycle
selection.
2
Increase until visualize conf.
3
O
K
On green display appears
0000 with 1st digit ashing,
while red display shows pass.
4
+
Flashing digit of green display
changes.
Enter password
1234.
5
O
K
Green display shows the rst
parameter while red display
shows the value.
6
Allows to switch from mne-
monic to numeric parameter
visualization (and vice versa).
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