I/O Data Details - Omron GRT1 - 11-2007 Operation Manual

GRT1-CT1(-1) Counter Units
7-4-3

I/O Data Details

Output Data
Words Bits
n and 00 to 15 Set Value
n+1
The Set Value is set between –2,147,483,648 and 2,147,483,647.
The Set Value will be transferred to the internal register specified by the Register Selection Bits (bits
00 to 02 of word n+2) when the Write Command Bit (bit 03 of word n+2) is turned ON.
n+2 00 to 02 Register Selection Bits
These bits determine for which internal register the Set Value (words n and n+1) will be used when
the Write Command Bit or Counter Data Display Command Bit (bit 03 or bit 04 of word n+2) is
turned ON.
Bit: 02 01 00
Write Command Bit (See note.)
03
Turn ON this bit to write the Set Value (words n and n+1) to the internal register specified by the
Register Selection Bits (bits 00 to 02 of word n+2).
If the selected register is 000, 001, 010, 110, or 111, then nothing happens.
04 Counter Data Display Command Bit (See note.)
Turn ON this bit to change the register displayed in the Counter Data (words m and m+1) to the reg-
ister specified by the Register Selection Bits (bits 00 to 02 of word n+2). The specified register will
not change regardless of write actions.
05 Digital Input Enable Bit
This bit enables and disables the digital input.
OFF: The function assigned to the digital input is disabled.
ON: The function assigned to the digital input is enabled.
06 and Digital Input Counter Reset Mode Bits
07
These bits set the counter reset mode for the digital input.
Bit: 07 06
08 Gate Control Bit
This bit enables and disables the counter.
OFF: Counting is enabled.
ON: Counting is disabled (i.e., no pulses are counted), and the Present Counter Value will not
change in response to encoder inputs.
The Present Counter Value can be changed using a reset or preset command even when counting
is disabled.
Capture Command Bit (See note.)
09
Turn ON this bit to store the Present Counter Value in the Capture Value Register.
Preset Command Bit (See note.)
10
Turn this bit ON (at time of starting) to set the Preset Value Register to the Present Counter Value.
240
The following table describes the data output from the Output Area allocated
in the Master to the Counter Unit. This data is used to set and control the
Counter Unit.
"n" is the first word in the Output Area allocated to the Counter Unit in the
Master.
0 0 0 = Present Counter Value
0 0 1 = Present Frequency (frequency of A input signal in Hz)
0 1 0 = Capture Value Register
0 1 1 = Preset Value Register
1 0 0 = Range Value Register 0 (LL)
1 0 1 = Range Value Register 1 (UL)
1 1 0 = Not supported.
1 1 1 = Not supported.
0 0 = Not supported.
0 1 = The counter value is reset to zero on first rising edge of the digital input.
1 0 = The counter value is reset to zero on every rising edge of the digital input.
1 1 = Not supported.
Definition
Section 7-4