Copyright © Siemens AG 2016. All rights reserved
275
ERTEC 200P-2 Manual
Technical data subject to change
Version 1.0
Ext_gate_trig_enable
Gate_polarity
Gate_effect
Timer_out_polarity
Event1/2_control
Event1/2_Inversion
The
Init_bit
is an initialization bit which resets the TIMER module, loads (restarts) the
counter with the value from the load register and loads the prescaler with the value from
the prescaler register. It deletes all values in the event registers and resets the edge
evaluation of the event inputs and the EXT_GATE_TRIG signal. After having been set by
the software, this bit is automatically deleted again, a reading of the bit by the software
always results in the value ’0’. The definition is carried out in accordance with the follow-
ing table:
Init_bit
Function
0
Bit Init_bit not active (no initialization)
1
Bit Init_bit active (initialization)
The counter
counts/loads
with the count/load clock. The selection is done by the mode
register bit Clk_input_select and the value of the prescaler register in accordance with the
following table:
Clk_input_select
Function
0
Count/load clock = rising edge of CLK_TIMT;
The counting/loading of the counter with the CLK_TIMT edge
only takes place if the prescaler value is ’0’
1
Count/load clock = external gate/trigger signal (edge evaluation
with CLK_TIMT is valued as count/load enable signal)
The
Reload_disable bit
determines if the counter stops the counting process when it has
reached the value ’0’ (single mode) or if the counter is automatically loaded = newly start-
ed with the reload value from the load register when the value ’0’ has been reached (re-
load mode). The definition is carried out in accordance with the following table:
Reload_disable
Function
0
Reload mode active
1
Single mode active
The
DIS_RLD_WHEN_WR_LDREG
bit in the mode register determines the effect of the
writing of a new value on the load register: