Rainbow Electronics ATA6830 - Manual (Page 15)

15
ATA6830
4575B–BCD–01/03
Travel operation is suspended when overtemperature is detected. An error signal is sent
to the bus master via the bus. Operation can only restart after the supply voltage is shut
off.
• Interruption of a stepping motor winding
The motor windings are only checked for interruption when supplied with hold current,
not during drive operation. The corresponding output is shut off. The other coil winding
is supplied with hold current. An error signal is sent. Operation can only restart after the
supply voltage is shut off.
• Short circuit of a stepping motor winding
The corresponding output is shut off. The other coil winding is supplied with hold cur-
rent. An error signal is sent. Operation can only restart after the supply voltage is shut
off.
• Short circuit of an output to ground or V
BAT
The corresponding output is shut off. The other coil winding is supplied with hold cur-
rent. An error signal is sent. Operation can only restart after the supply voltage is shut
off.
An error signal is sent to the microcontroller by clamping the bus to ground for 3 sec-
onds. If the error should occur during a data transmission, the above described
reactions will happen immediately except for the clamping. This will take place about
200 µs after the end of the stopbit of the lowbyte to guarantee a correct command rec-
ognintion in the second headlamp. The error signal timing is shown in Figure 15.
Figure 15. Error Signal Timing
ERROR RESPONSE MESSAGE FRAME
3 s ca. 9.2 ms
Buslevel
1
0
Absolute Maximum Ratings
Parameters Symbol Value Unit
Power supply (t < 400 ms) V
BAT
-0.3 to +45 V
DC power supply V
BAT
-0.3 to +28 V
DC output current I
OUT
±1.1 A
BUS input voltage V
BUS
-0.3 to V
BAT
+0.3 V
Human body model ESD 2 kV
Charged device model ESD 500 V
Storage temperature T
Stg
-55 to +150
°
C
Operating temperature T
op
-40 to +105
°
C
Maximum junction temperature T
jmax
+150
°
C