SICK HIPERFACE DSL - Parameters Channel

CAUTION
The safe position is not synchronized with the last control cycle present at the DSL Mas‐
ter IP Core. The safe position should not be used in the control circuit for frequency
inverter position or speed.
The safe position is stored in the VPOS0…4 registers and can be polled via drive inter‐
face (see figure 24).
Figure 24: Polling the safe position
As soon as the DSL master identifies a difference between the transmitted safe posi‐
tion and the integrated fast position, the POS error bit is set in the EVENT_H register
(see chapter 7.5).
7.5
Parameters Channel
The HIPERFACE DSL
®
Parameters Channel is for access to the motor feedback system
parameters.
Using two separate access mechanisms, the Parameters Channel distinguishes
between two separate data areas:
•
Interface information is polled via "short messages".
•
Information on the motor feedback system is polled via "long messages".
7.5.1 Short message
Remote (DSL motor feedback system) registers that indicate interface information are
mirrored in the DSL Master under register addresses 40h to 7Fh. These remote regis‐
ters are addressed in the same way as DSL Master registers.
As the values of remote registers are transmitted via the Parameters Channel and
hence via the DSL cables, the delay between polling and answer for "short message"
transactions depends on the connection cables of the systems in question. Unlike DSL
Master registers, the frequency inverter application must wait for the answer to arrive.
Although remote registers are addressed and written in the same way as DSL Master
registers, the answer is recorded in a special DSL Master register (PC_DATA, 2Fh).
The value of the direct answer that reaches SPI1 MISO during reading or writing is a
dummy value.
In the EVENT_L DSL Master register, FRES indicates whether the "short message"
channel is busy or whether the answer has reached the DSL Master. FRES can be eval‐
uated for all SPI1 operations as the register content is a component of every SPI1 trans‐
mission (bit 0 in ONLINE STATUS L, see chapter 6.2).
The Parameters Channel can only transmit one "short message" at a time. Several
remote registers can only be polled in sequence, i.e. after the previous answer has
been received.
CENTRAL FUNCTIONS 7
8017595/ZTW6/2018-01-15 | SICK T E C H N I C A L I N F O R M A T I O N | HIPERFACE DSL
®
67
Subject to change without notice