WAGO 750-633, Manual

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WAGO-I/O-SYSTEM 750 Process Image 33
750-633 Up/Down Counter Ex i
Manual
Version 1.3.0 HW-Version 03, SW-Version 01
4.2 Operating Mode 3 – Frequency Counter
The Watchdog time to be set is stored in binary format in the 2 output bytes (D0,
D1). The output bytes (D2, D3) are not used. In the 4 input bytes (D0 ... D3), the
frequency value is stored in binary format. Control byte C0 is used to set the
integration time, the Watchdog time and the measured value display, as well as to
set the output. Status byte S0 shows the confirmation of the settings and the status
of the inputs and outputs.
Table 22: Process Image, Operating Mode 3
Input Output
S0 Status byte C0 Control byte
D0 Counter value byte 0 (LSB) D0 Watchdog time byte 0 (LSB)
D1 Counter value byte 1 D1 Watchdog time byte 1 (MSB)
D2 Counter value byte 2 D2 Reserved
D3 Counter value byte 3 (MSB) D3 Reserved
Table 23: Control Byte C0, Operating Mode 3
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
0 0 0 T
WD
REQ 0 SET_DO
RANGE_
SEL
REQ1
RANGE_
SEL
REQ0
RANGE_SEL
REQ0
Selection of the integration time and display of the measured frequency values
(see below).
RANGE_SEL
REQ1
Selection of the integration time and display of the measured frequency values
(see below).
SET_DO Set output DO
T
WD
REQ Requirement to change the Watchdog time (T
WD
) with valid data.
0 This value is always 0 and may not be changed.
Table 24: Status Byte S0, Operating Mode 3
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
X
NAMUR_
ERR
ST_GATE T
WD
ACK X ST_DO
RANGE_
SEL
ACK1
RANGE_
SEL
ACK0
RANGE_SEL
ACK0
Confirmation of the range selection, frequency values are valid (see below).
RANGE_SEL
ACK1
Confirmation of the range selection, frequency values are valid (see below).
ST_DO Status output DO
T
WD
ACK Confirmation of the change from T
WD
.
ST_GATE Status of the GATE input (0=enabled, 1=disabled)
NAMUR_ERR Namur error at input
X
This value is not defined and cannot be evaluated.
* In the error state (bit 6 is set), the status bits 0, 1, 2, 3, 4, 5 are always set to 0.
The following functions can be executed: