Rockwell Automation 1760-DNET Pico DeviceNet Communications Module User Manual User Manual
Page 68
Publication 1760-UM003A-EN-P - September 2005
6-24 Application Examples for Pico
Example:
Data 1 (Byte 4) = 0x07
Meaning:
The values appear in the Parameter menu. The counter is used in the
mode of the frequency meter. The counter setpoint 1 is not assigned
to a constant and cannot therefore be written to.
Table 6.44 Operand overview
Index
(hex)
Operand
Read
Write
00
Parameters Table 6.45
x
01
Control byte Table 6.46
x
02
Process variable
S1
(1)
(1) A 16-bit value is transferred in data bytes Data 1 – Data 2. It should be remembered that
Data 1 is the low byte and Data 2 the high byte.
x
c
(2)
(2) The value can only be written if it is assigned to a constant in the program.
03
Counter setpoint 2
x
Table 6.45 Index 00 – Parameters
Meaning
Bit 7
6
5
4
3
2
1
0
Appears in the parameter menu
Yes/no
0/1
Counter mode
FB not used
0
0
Up/down counter (N)
0
1
High-speed up/down counter (H)
1
0
Frequency counter (F)
1
1
Use as constant and therefore can be written to
Counter setpoint S1
0/1
Unused bits
–
–
–
–
Table 6.46 Index 01 – Control byte
Data 1
Bit
7
6
5
4
3
2
1
0
FB output
–
–
–
–
C
(1)
(1) Count coil, counts on every rising edge
RE
(2)
(2) Reset, the timing relay is reset (reset coil)
D
(3)
(3) Count direction: 0 = up counting, 1 = down counting
Q1
(4)
(4) Switch contact