IC-MG Datasheet, PDF (18/20 Pages) IC-Haus GmbH – 8-Bit Sin/Cos INTERPOLATION IC WITH RS422 DRIVER

iC-MG
preliminary
8-Bit Sin/Cos INTERPOLATION IC WITH RS422 DRIVER
ERROR MONITORING and ALARM OUTPUT
Rev C1, Page 18/20
iC-MG monitors input signals, the internal interpolator
and the controlled sensor supply via which the input
signal levels are stabilized. Should the sensor supply
tracking reach control limits this can be interpreted as
an end-of-life message, for example.
The display logic and minimum indication time are
settable; an internal pull-up current source can be
switched in. At the same time pin NERR has an input
function to trigger a new configuration run (see Serial
EEPROM Interface).
Two separate error masks determine whether error
events cause the RS422 output drivers to shutdown
(mask EMASKO) or are signaled as an alarm via
the current-limited open drain I/O pin NERR (mask
EMASKA).
EMASKO
Bit
9
8
7
6
5
4
3
2
1
0
Adr 0x17, bit 1:0; Adr 0x16, bit 7:0
Error event
n/a
Temporal tracking error (e.g. after cycling power)
Loss of tracking due to excessive input frequency
n/a
Excessive temperature shutdown
System error: I/O pin NERR pulled to low by an
external error signal (only permitted with EPH = 0)
PWR control out of range (at max. limit)
PWR control out of range (at min. limit)
Signal clipping (excessive input level)
Loss of signal (poor input level or s/c phase out of
range)
Table 35: Driver Shutdown Error Codes
EMASKA
Bit
9
8
7
6
5
4
3
2
1
0
Adr 0x15, bit 1:0; Adr 0x14, bit 7:0
Error event
n/a
Temporal tracking error (e.g. after cycling power)
Loss of tracking due to excessive input frequency
n/a
Excessive temperature warning
Ungated index enable signal Zin
PWR control out of range (at max. limit)
PWR control out of range (at min. limit)
Signal clipping (excessive input level)
Loss of signal (poor input level or s/c phase out of
range)
EPU
Code
0
1
Adr 0x17, bit 2
Function
No internal pull-up active
Internal 300 µA pull-up source active
Table 37: Alarm Output Pull-Up Enable
EPH
Code
0
1
Adr 0x15, bit 2
Pin logic
Low on error (otherwise Z)
Z on error (otherwise low)
Table 38: Alarm Output Logic
EMTD
Code
0x0
0x1
0x2
0x3
Adr 0x15, bit 5:3
Indication time
0 ms
12.5 ms
25 ms
37.5 ms
Code
0x4
0x5
0x6
0x7
Indication time
50 ms
62.5 ms
75 ms
87.5 ms
Table 39: Minimal Alarm Indication Time
Table 36: Alarm Output Error Codes