Specifications

Positioning IP 240
Interrupt bit Bit is ”1”
UEB
(Overflow)
The actual value has exited the valid actual value range and entered the
overrange.
MES
UBS
MES
(Measuring
terminated)
UBS
(Over-
written)
Following a negative edge of the synchronization signal, the old final value
was overwritten with the new final value without the old final value having
been read.
DRB
(Wirebreak)
The IP 240 detected a wirebreak in a symmetrical encoder.
NPU (Zero mark
monitoring)
The IP 240 detected a zero mark error.
The MES and UBS bits are relevant only when synchronization with an external control signal was
selected in parallel with actual value acquisition.
The IP 240 detected a negative edge of the synchronization signal at the IN
input and stored the current actual value as final value.
10.18 Modifying the Position Data and the Zero Offset
The position values, the distance values of the switching and signalling ranges and the zero offset
are transferred to the IP 240 for the first time during configuring. After configuring, you can
modify these data. The position numbers are defined during the configuring phase only; they
cannot be subsequently modified, nor can new position numbers be defined.
To prevent data interchange from unduly increasing the channel's response time, you can transfer
new position values only when the IP outputs are disabled. Over the STEP 5 program, you must
ensure that the increase in the cycle time does not excessively on-load the other IP channel. You
can check the state of the IP outputs by reading status bits DA1 and DA2. If it is necessary to
disable the outputs, you can do so by transferring control bit FREI=0.
The following ranges of values are permissible for new data:
Range of values for Range limits
Number format
Binary BCD
The position value for a linear axis -9,999,999 to+9,999,999 • •
The position value for a rotary axis 0 to [final value for rotary axis - 1] • •
The distance values for ranges BEE1,
BEE2 and BEE3
(additional values for a rotary axis)
0 to 999,999
(but not exceeding 0.5·[final value
for rotary axis])
••
Zero offset
(additional values for a rotary axis)
-9,999,999 to+9,999,999
(but not exceeding [final value for
rotary axis])
••
Note the following when choosing the distance values:
Distance for range BEE1 distance for BEE2 distance for BEE3
10-64 EWA 4NEB 811 6120-02a