User manual

Publication 1760-UM001A-EN-P
Retention 7-17
Function of the Pico circuit diagram:
T1 provides the clock pulse. When a time of t = 0.5 seconds is selected the
counting period amounts to 2 x t = 1 s. One pulse is counted every second. The up
counter C8 switches valve Q1 on via M15 at 3600 counting pulses (3600 s = 1 h).
M15 resets C8 and prepares C8 for the next hour. To stop C8 from continuing to
count while lubrication is in process, the break contact of M15 blocks the counting
of pulses.
T8 is actuated by means of M15. Once T8 has timed out, M15 and T8 will be
reset.
In order that both the time elapsed since the last lubrication (counter C8) and also
the lubrication pulse remains constant in the event of a power outage, C8, M15
and T8 must be retentive.
-----------TT1
T1-M15-----CC8
C8--------SM15
M15--------TT8
RC8
M15-T8-----{Q1
T8--------RM15
00.50
TRG
RES
T1
+
{
S
3600
DIR
CNT
RES
C8
+
{
{
T8
+
RES
30.00
TRG
X
S
{
Circuit Diagram:.
Parameters entered:
Parameter Display:
Parameters entered: