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Data
Section 3-3
64
3-3-2
Configurable data
The amount of configurable data that is exchanged between the PLC CPU and
the CJ1W-MCH72 each PLC cycle is 8 blocks from the PLC CPU to the
CJ1W-MCH72 and 8 blocks vice versa. Thus, 16 blocks of data are
exchanged in one PLC cycle. A block is a continuous memory area or array
area. The total size of all 16 blocks must be less than or equal to 2000 words.
The configurable data can be exchanged between the VR, IN, OP, AIN, AOUT
and Axis Status memory areas of the CJ1W-MCH72 and the CIO, DM and EM
memory areas of the PLC CPU.
Because the PLC CPU and the CJ1W-MCH72 use different numeric formats,
the data that is exchanged must be cast. The table below lists the casting of
numeric data per memory area.
/i
Digital and analogue inputs and outputs may not be physically present, which
makes them virtual and as such they can still be used in cyclic data exchange.
3-3-2-1 Axis Status array
The Axis Status array is a special array that exists of 4 fields. The table below
lists the Axis Status fields and the corresponding PLC data type.
/i
n
+12
0..13
Process Error flags for processes 1..14
14,15
Always 0
n+13
0..7
Configurable data block transfer error
Each bit corresponds to a block transferred from PLC CPU to CJW-
MCH72. A bit being on indicates a transfer error. See 3-3-2.
8..15
Configurable data block transfer error
Each bit corresponds to a block transferred from CJW-MCH72 to
PLC CPU. A bit being on indicates a transfer error. See 3-3-2.
Word
Bit
Description
PLC data format
CJ1W-MCH72
Memory area
Data format
32-bit IEEE float
VR
floating point
16-bit word
VR
floating point
IN
bit array
OP
bit array
AIN
floating point
AOUT
floating point
Axis Status field
Description
PLC data type
Status
BASIC command
AXISSTATUS
16-bit word
Position
Measured position in encoder units (if
devided by UNITS axis parameter gives
MPOS
axis parameter)
32-bit integer
Monitor
BASIC command
DRIVE_MONITOR
16-bit word
Drive status
Status of the drive
16-bit word
Содержание trajexia CJ1W-MCH72
Страница 69: ...Specifications Section 2 4 58...
Страница 83: ...FINS commands Section 3 4 72...
Страница 147: ...All BASIC commands Section 4 2 136 AXIS 1 AXIS 0...
Страница 277: ...All BASIC commands Section 4 2 266...
Страница 278: ...267 SECTION 5 Examples This chapter gives 2 categories of examples and tips How to s Practical examples...
Страница 371: ...360 Index...
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