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Terminal Blocks
6-1
Terminal Blocks
This section describes the communications settings and I/O formats for communica-
tions with external devices via the terminal block.
6-1-1
I/O Format
Inputs
The following commands can be input in Run Mode.
STEP Input
One measurement will be performed when the STEP signal turns ON. (STEP signal
can also be input in Monitor Mode.)
DI0 to DI7 Inputs
The DI0 to DI7 inputs can be used to execute measurements continuously or to
switch scenes as shown in the following table.
DI7 is the input trigger. A delay of at least 1 ms must, be provided after DI0 to DI6 are
set before DI7 is turned ON.
Co
Command
a d
Continuous
measurement
Switching scenes
Example 1
0: OFF
1: ON
*: Status is not read by F400, i.e., the status does not matter.
Outputs
The judgements for expressions or regions can be output by allocating them to termi-
nals, DO0 to DO15. The overall judgement is output to the OR terminal.
The data is only output in Run mode. There is no output to the terminals in Monitor
mode.
The F400 can be set to turn ON terminals for either OK or NG results. The default is for
output to be ON for NG results.
OR Terminal
The overall judgement is output to the OR terminal. This overall judgement will be NG
if there is even just one NG judgement for the set measurement regions or expres-
sions.
DO Terminals
The outputs made to the terminals are as follows:
DO terminals
0 to 15
Caution
!
The initial status of the output terminals is OFF. The terminals, however, may turn ON
for approximately 0.5 s when the power is turned ON. Be sure to allow for this when
reading the status at an external device.
Refer to 3-4 Expressions
6-1-2
Terminal Signal Operation and Timing
When performing communications without handshaking, the F400 outputs the mea-
surement results without synchronizing with the external device. Read the measure-
ment results at the external device while the GATE terminal is ON.
112
DI inputs
Execute
Command
7
6
5
4
1
0
0
1
1
0
1
0
0
1
0
The judgements for the expressions set in Expression/Judge (in
Set mode) allocated to DO 0 to DO 15 will be output.
Operand
3
2
1
0
*
*
*
*
Measurement is performed
continually during command input.
Scene no.
Switches the scene.
0
0
1
0
Switches to scene 2.
Output
p. 75
Section
6-1
— Filter/Pickup —
Function
u c o
— Filter/Pickup —
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