Technical Manual

44 Raveon Technologies Corp.
TRIGBITS x This command enables or disables individual bits for use as
input triggers. If a bit is designated a Trigger Bit, then its state is
latched until it is transmitted.
TRIGPOL x Sets the polarity of the input trigger bit. 0=active high,
1=inverted, active low. Setting TRIGPOL 0 will mean all trigger
bits are active high, and their state will be latched as a high (1) if
the bit ever goes high.
TRIGEX x Sets which bits are used to report on exception. Exception
reporting is when a position/status report is generated when an
input changes either low-to-high or high-to-low. A Trigger Bit
that is set to trigger by exception with the TRIGEX command will
report 0 if it does not change, or 1 if it changed since the last
time the M6 reported position.
The xx parameter is the hex binary representation of the bits. Refer to the
following table to see the value for x.
IN 2
(TXD)
IN 1
(RTS)
IN 0
(DTR)
Hexadecimal
Representation
0
0
0
0
0
0
1
1
0
1
0
2
0
1
1
3
1
0
0
4
1
0
1
5
1
1
0
6
1
1
1
7
For example, to enable bits 0 and 2 (DTR and TxD pins) to be used as digital
input, issue the following commend:
TRIGBITS 5
If the bits are to be normally active high, then the polarity must be set to 0
(TRIGPOL 0 command). To set bit 0 so that it is inverted (active low), use the
following command:
TRIGPOL 1
This will cause the unit to transmit when bit 0 (DTR pin) is low.
To enable exception reporting, that is transmit when a pin changes from low-to-
high or high-to-low, use the TRIGEX command. When TRIGEX is 0, all inputs
are active either high or low. When a bit is set to 1 in TRIGEX, then that bit will
cause the unit to transmit position/status anytime it changes state. The M6 will
report the bit as a 1 if it changes state, or 0 if it did not change state.
For example, to configure the unit to transmit position when bit 0 changes state,
issue these commands: