Jetter JetWeb JX2-CNT1, Руководство пользователя

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10.3 Dual-Channel Counter as Single-Channel Counter JetWeb
62 Jetter AG
The count value consists of the following elements:
10.3 Dual-Channel Counter as
Single-Channel Counter
It is possible to operate the dual-channel counter as single-channel counter. To do
so, virtual output xx02 "Counter type" of the JX2-CNT1 module must be set = single-
channel counter. For information on how to install the single-channel counter refer to
chapter 6.7.1 "Description of Connections - Encoder Signals", page 37.
The counting direction depends on the level of the K2 signal. For more information
refer to Fig. 13. The count value is incremented or decremented at every positive
edge of the counting channel K1. The count value of the single-channel counter can
be seen from register 3xx0 "Count value", or it can be changed there manually.
R3xx0 (count) = internal count + R3xx1 (reference position offset)
Note!
By writing a value into register 3xx0, exact referencing of the position value from
the incremental encoder
cannot be achieved. Significant position inaccuracies
may occur if a reference position is written into the register, for example, when the
encoder moves while the value is written into the register.
Exact referencing of the incremental encoder position can be achieved if the
referencing function is used along with register 3xx1 "Offset value". For more
information refer to chapter 10.4 "Referencing", page 64.