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4-3
Preset Mode
In preset mode counter values are decremented (or incremented) according to
any of the three types of input pulses. When the start signal is set, the counter
value begins from a specified, preset value (maximum: 8,388,607). Up to 20
counter values can be preset. These presets can be updated from the PC six at a
time by using TRANSFER DATA.
Eight outputs are available that can be output to the PC and/or externally, i.e.,
directly to an external device. The first output (#0) turns ON when counting is
started and turns OFF at a specified counter value. The next two outputs (#1 and
#2) turn ON and OFF at specified counter values. The last four outputs (#4
through #7, output #3 is not used in preset mode) turn ON for either a specified
length of time or indefinitely following the countdown. The counter values at
which outputs turn ON and/or OFF cannot be changed during operation.
Although control input IN1 is supported as a reset input, control input IN2 and
input Z are not used.
Note that, because the counter is designed to count down in preset mode, the
encoder input should be set accordingly.
The START command (word n, bit 00) is used to start and stop (i.e., as the start
signal) the Counter Unit when pin 4 on the back-panel DIP switch is turned OFF.
Control input IN2 is used to start and stop the Counter Unit when pin 4 is ON.
4-3-1
Data Allocation
DM Area
The DM area contains the user-input parameters that are to be set into the
Counter Unit, including the operating mode and ON/OFF counter value. The
first DM word for each Counter Unit is indicated by m and equals 1,000 plus
100 times the unit number.
Word
Bit
Function
m
07 through 00
Set to 0.
11 through 08
Operating mode (Here, 3: preset)
15 through 12
Set to 0.
m+1
15 through 00
OFF counter value for output #0, 7 digits
m+2
11 through 00
15 through 12
Set to 0.
m+3
15 through 00
ON counter value for output #1, 7 digits
m+4
11 through 00
15 through 12
Set to 0.
m+5
15 through 00
OFF counter value for output #1, 7 digits
m+6
11 through 00
15 through 12
Set to 0.
m+7
15 through 00
ON counter value for output #2, 7 digits
m+8
11 through 00
15 through 12
Set to 0.
m+9
15 through 00
OFF counter value for output #2, 7 digits
m+10
11 through 00
15 through 12
Set to 0.
m+11
15 through 00
ON time for outputs #4 through #7, 4 digits (unit: 0.01 s)
Output will remain on until next the start signal if FFFF is
input.
m+12
m+13
Not used.
m+14
15 through 00
Preset #0, 6 digits
Preset Mode
Section 4-3
Содержание SYSMAC C200H-CT001-V1
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Страница 3: ...C200H CT001 V1 CT002 High speed Counter Units Operation Manual Revised September 2000...
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