38
SM N°
ModBus
Address
Description / Meaning
SM0
1000
Bit state
Bit 0
Bit RUN/STOP (1 = RUN). At startup
this bit is always forced ON (PLC in
RUN). In STOP the output relays of
the PLC are disabled.
R/W
Bit 1
Bit always ON for the first scan cycle
of the main program. It becomes
used, for example, to execute a
subprogram of initialization.
R
Bit 2
Bit that allows use of a 60-second
clock impulse (ON for 30 seconds,
OFF for 30 seconds).
R
Bit 3
Bit that allows use of a 1-second
clock impulse (ON for 0.5 seconds,
OFF for 0.5 seconds).
R
Bit 4
Bit clock of scan cycles that is active
(ON) for a cycle and deactivated
(OFF) for the successive cycle. It can
be used as an input for counting
scan cycles.
R
Bit 7
Bit ON during the transmission
phase of data on serial port EXP1. It
is automatically switched OFF at the
end of the transmission.
R
Bit 8
Bit ON during the transmission
phase of data on serial port COM2. It
is automatically switched OFF at the
end of the transmission
R
Bit 10
This bit, if set ON, enables the serial
port EXP1 in "modem" mode. That
means that the timeout between one
character and another in reception is
automatically fixed to 40 mS.
R/W
Summary of Contents for TD240 series
Page 1: ...Manuale operatore...
Page 2: ...2...
Page 6: ...6 3 Mechanical dimensions and installation...
Page 24: ...24 7 1 Starter Kit Connection of the terminal to the PC...
Page 27: ...27 7 2 1 Creation of a new project...
Page 89: ...89 11 Notes Updates...
Page 90: ...90...
Page 91: ...91...