IC-MSB_17 Datasheet, PDF (28/32 Pages) IC-Haus GmbH – SIN/COS SIGNAL CONDITIONER

iC-MSB^SAFETY, iC-MSB2
SIN/COS SIGNAL CONDITIONER WITH 1Vpp DRIVER
ERROR MONITORING AND ALARM OUTPUT
Rev F3, Page 28/32
The following table gives the errors which can both be figured by EPH, and the minimum indication time by
recognized by iC-MSB and enabled either for messag- EMTD.
ing, output shutdown or protocol in the EEPROM.
Mask EMASKA stipulates that errors should be signaled
at pin ERR, mask EMASKO determines whether the
line drivers are to be shutdown or not (with PDMODE
defining reactivation) and mask EMASKE governs the
storage of error events in the EEPROM.
Pin ERR also acts as an input for error messages of
the external system. This function requires EPH = 0
and an external error being low active. Pin ERR can
also switch iC-MSB to test mode, for which a voltage of
larger than VTMon must be applied (see page 19).
EMASKA
EMASKO
EMASKE
Bit
6*
5
4
3
2
1
0
EMASKA
1
0
*Note
EMASKO
1
0
*Note
Addr 0x14, bit 6:0
Addr 0x16, bit 6:0
Addr 0x18, bit 2:0; Adr 0x17, bit 7:4
Error Event
Configuration error
(SDA or SCL pin error, no acknowledge signal from
EEPROM or invalid check sum);
Excessive temperature warning
External system error
Control error 2: range at max. limit
Control error 1: range at min. limit
Signal error 2: clipping
Signal error 1: loss of signal
(wrong s/c phase, poor differential amplitude, may
also result from excessive input signals or internal
signal clipping)
Error Mask Alarm Output ERR
Enable: event changes state of pin ERR
(if EMASKO does not disable the output function).
Disable: event does not affect pin ERR.
EMASKA(6): Pin ERR can not pull low on config.
error. Use EPH = 1 for high-active error logic.
Error Mask Driver Shutdown
Enable: event resets pin ACO to the 5 mA range,
tristates the line driver outputs and pin ERR (i.e.
low-active error messages can not be displayed)
Disable: output functions remain active
EMASKO(6) = 1 (ROM bit): The line drivers remain
high impedance (tristate) when cycling power.
EMASKE
1
0
*Note
Program EMASKO(6) = 0 to EEPROM.
This allows to reactivate disabled output drivers by
toggling bit NTRI (set zero, then one). If set 1, the
driver shutdown persists and can not be resolved.
Error Mask EEPROM Savings
Enable: event will be latched
Disable: event will not be latched
Program EMASKE(6) = 0 to EEPROM.
This avoids conflicts with I²C programming adapters
which are not multi-master capable.
Table 49: Error Masking
EPH
Code
0*
1
Note
Addr 0x15, bit 2
State with error
State w/o error
active low
high impedance
(evaluation of low active
external system error)
high impedance
(or optional pull-up)
active low
*) Pin ERR is disabled during driver shutdown and
cannot indicate errors in this case.
Table 50: I/O Logic, Alarm Output ERR
EMTD
Code
0x0
0x1
0x2
0x3
Addr 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 51: Min. Indication Time, Alarm Output ERR
EPU
Code
0
1
Addr 0x17, bit 2
Function
No internal pull-up
Internal 300 µA pull-up current source active
Table 52: Pull-Up Enable, Alarm Output ERR
Excessive Temperature Warning
Exceeding the temperature warning threshold T_w (cor-
responds to T₂, refer to Tempeprature Sensor, page
17) can be signaled at pin ERR or used to shut down
the line drivers (via mask EMASKO). The temperature
warning is cleared when the temperature falls below
T_w - T_hys.
Alarm Output: I/O pin ERR
Pin ERR is operated by a current-limited open-drain
output driver and has an internal pull-up which can be
disabled. The output logic (low or high active) is con-
Note: If the temperature shutdown threshold T_off =
T_w + ∆ T is exceeded, the line drivers are shut down
independently of EMASKO. For ∆ T refer to Elec.
Char. E06.