Copyright © Siemens AG 2016. All rights reserved
266
ERTEC 200P-2 Manual
Technical data subject to change
Version 1.0
2.3.10.2.8 Register Description
The data-bus-width of all specified registers in this module is: 32 .
A '0h ' is read from Software for each not specified Bit in the registers.
The addressing is organized: WORD - wise
Register:
WD_CTRL_STATUS
Address:
0h
Bits:
31dt0
Reset-Value: 00000000h
Attribute:
(r)(h) (w)(k)
Description:
Control/Status register. Configuration and control bits for the watch-
dog.
Bit
Identifier
Reset Attr.
Function / Description
31dt16 Key_bits
0000h wk
Key bits for writing this register (read = 0).
If bits 31-16 = 9876h, bits 0-4 of this register
will be written, otherwise the operation has
no effect.
4
Status_Counter1 0h
rh
Watchdog status counter 1 (write is ignored):
0: Watchdog counter 1 has not expired
1: Watchdog counter 1 has expired
Note: This bit then can only be read as '1'
when RUN/xStop_Z1 is active (1).
3
Status_Counter0 0h
rh
Watchdog status counter 0 (write is ignored):
0: Watchdog counter 0 has not expired
1: Watchdog counter 0 has expired
Note: This bit then can only be read as '1'
when RUN/xStop_Z0 is active (1).
2
Load_Trigger 0h
r w
Watchdog trigger (load watchdog counters 0
and 1 with the value of the Reload registers):
0: Do not trigger watchdog
1: Trigger watchdog
Although this bit can be read back, it acts
only during a write.
To trigger the watchdog counters, it suffices
to write a 1 to this bit; no 0/1 edge is re-
quired.
The trigger signal acts on both watchdog
counters.
1
Run_xStop_Z1 0h
r w
Enable/disable watchdog counter 1:
0: Watchdog counter 1 disabled
1: Watchdog counter 1 enabled
Note: If this bit = 0, the XWDOUT1 output of
the ERTEC 200P is passive (1) and the sta-
tus bit of counter 1 (bit 4) is 0.
0
Run_xStop_Z0 0h
r w
Enable/disable watchdog counter 0:
0: Watchdog counter 0 disabled