Omron H8GN User manual

2000-09-26
PRODUKTINFORMATION
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ELFA artikelnr
37-768-04 Räknare/Tidrelä H8GN

4
Preset Counter/Timer H8GN
World’s Smallest Compact Preset
Counter/Timer
1/32-mm DIN with Communications
Only 48 x 24 x 83 mm (W x H x D)
Switch between 4-digit preset counter and 4-digit
timer operation.
While using the preset counter, it is possible to
switch the display to monitor the totalizing count
value (8 digits).
Built-in prescaling for counter operation.
ON/OFF-duty adjustable flicker mode that can be
used to perform cyclic control is available for timer
operation.
Four preset values that can be changed by the front
panel key (SV-bank).
Finger protection terminal block to meet
VDE0106/P100.
Panel surface compatible with NEMA4X/IP66.
Conforms to UL, CSA, and IEC safety standards as
well as CE Marking.
Six-language instruction manual provided.
RC
Ordering Information
Supply voltage Output Communications
Supp y o age
Ou pu
No communications RS-485
24 VDC
Contact out
p
ut (SPDT)
H8GN-AD
H8GN-AD-FLK
24
VDC
C
ontact output
(SPDT)
H
8
GN
-
AD
H
8
GN
-
AD
-
FLK
Model Number Legend:
H8GN-AD-j
12
1. Supply V oltage
D: 24 VDC 2.
Communications Output T ype
None:
Communications not supported
FLK: RS-485

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5
Specifications
Ratings
Rated supply voltage 24 VDC
Operating voltage range 85% to 1 10% of rated supply voltage
Power consumption 1.5 W max. (for max. DC load) (Inrush current: 15 A max.)
Mounting method Flush mounting
External connections Screw terminals (M3 screws)
T erminal screw tightening torque 0.5 N ⋅ m max.
Display 7-segment, negative transmissive LCD; time display (h, min, s); CMW , OUT, RST , T OTAL
Present value (red, 7-mm-high characters); Set value (green, 3.4-mm-high characters)
Digits PV : 4 digits
SV : 4 digits
When total count value is displayed: 8 digits
(Zeros suppressed)
Memory backup EEPROM (non-volatile memory) (number of writes: 100,000 times)
Counter
Maximum counting
speed
30 Hz or 5 kHz (See note.)
Counting range –999 to 9,999
Input modes Increment, decrement, individual, quadrature inputs
Output modes N, F , C, or K
Timer T
ime ranges 0.000 to 9.999 s, 0.00 to 99.99 s, 0.0 to 999.9 s, 0 to 9999 s, 0 min 00 s to 99 min 59 s, 0.0 to
999.9 min, 0 h 00 min to 99 h 59 min, 0.0 h to 999.9 h, 0 h to 9999 h
T imer modes Elapsed time (Up), remaining time (Down)
Output modes A, B, D, E, F , or Z
Inputs
Input signals For Counter: CP1, CP2, and reset
For T
imer: Start, gate, and reset
Input method No-voltage input (contact short-circuit and open input)
Short-circuit (ON) impedance: 1 K Ω max. (Approx. 2 mA runof f current at 0 Ω)
Short-circuit (ON) residual voltage: 2 VDC max.
Open (OFF) impedance: 100 k Ω min.
Applied voltage: 30 VDC max.
Start, reset, gate Minimum input signal width: 1 or 20 ms (selectable)
Power reset Minimum power-opening time: 0.5 s
Control output SPDT contact output: 3 A at 250 V AC/30 VDC, resistive load (cos φ = 1)
Minimum applied load 10 mA at 5 VDC (failure level: P , reference value)
Reset system External, manual, and power supply resets (for timer in A, B, D, E, or Z modes)
Sensor waiting time 260 ms max. (Inputs cannot be received during sensor wait time if control outputs are turned
OFF.)
Note: The figures given for maximum counting speed are for incrementing or decrementing operation with a prescale value of × 1. If prescal -
ing
is used and 5 kHz is set, the maximum counting speed will be reduced to about half. The maximum counting speed will also be
reduced to about half when the up/down mode is selected.

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6
Characteristics
Timer function Accuracy of
operating time and
setting error
(including
temperature and
voltage effects)
Signal start: ± 0.03% ±30 ms max.
Power-ON start: ±
0.03% ±50 ms max.
Insulation resistance 100 M Ω min. (at 500 VDC)
Dialectic strength 1,500 V AC, 50/60 Hz for 1 min between output terminals and non-current-carrying
metal parts
510 V AC, 50/60 Hz for 1 min between current-carrying terminals (except output
terminals) and non-current-carrying metal parts
1,500 V AC, 50/60 Hz for 1 min between output terminals and current-carrying
terminals (except output terminals)
500 V AC, 50/60 Hz for 1 min between communications terminals and current-carrying
terminals (except output terminals)
1,000 V AC, 50/60 Hz for 1 min between contacts not located next to each other
Noise immunity Square-wave noise by noise simulator;
± 480 V (between power terminals), ±600 V (between input terminals)
Static immunity ± 8 kV (malfunction), ±15 kV (destruction)
V ibration resistance
Malfunction 10 to 55 Hz with 0.35-mm single amplitude each in three directions for 10 min
ba o essa ce
Destruction 10 to 55 Hz with 0.75-mm single amplitude each in three directions for 2 h
Shock resistance
Malfunction 100 m/s
2
, 3 times each in six directions
Soc essace
Destruction 300 m/s
2
, 3 times each in six directions
Life expectancy
Mechanical 10 million operations
e e pec a cy
Electrical 100,000 operations min. (3 A at 250 V AC, resistive load)
Ambient
tt
Operating –10° C to 55 ° C (with no icing or condensation)
be
temperature Storage –25°
C to 65 ° C (with no icing or condensation)
Ambient humidity 25% to 85%
EMC (EMI):
Emission Enclosure: EN61326 Class A
(EMS): EN61326
Immunity ESD: EN61000-4-2: 4 kV contact discharge (level 2)
8 kV air discharge (level 3)
Immunity RF-interference: EN61000-4-3: 10 V/m (Amplitude-modulated,
80 MHz to 1 GHz) (level 3);
10 V/m (Pulse-modulated,
900 MHz ± 5 MHz) (level 3)
Immunity Conducted
Disturbance: EN61000-4-6: 3 V (0.15 to 80 MHz) (level 2)
Immunity Burst: EN61000-4-4: 2 kV power-line (level 3);
1 kV I/O signal-line (level 4);
1 kV communications-line (level 3)
Immunity Surge: EN61000-4-5: 1 kV between lines
(power and output lines) (level 3);
2 kV between grounds
(power and output lines) (level 3)
Approved standards UL508, CSA C22.2 No.14
Conforms to EN61010-1/IEC61010-1 (Pollution degree 2/overvoltage category II)
Conforms to VDE0106/P 100 (Finger Protection)
Case color Rear section: Gray smoke; Front section: N1.5 (black)
Enclosure ratings Panel surface: IP66 and NEMA T ype 4X (indoors)
Rear case: IP20
T erminal block: IP20
Weight Approx. 80 g

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Communications Specifications
Transmission path connections Multidrop
Communications method RS-485 (two-wire, half duplex)
Synchronization method Start-stop synchronization
Baud rate (See note.) 1,200/2,400/4,800/9,600 bit/s
T ransmission code ASCII
Data bit length (See note.) 7 or 8 bits
Stop bit length (See note.) 1 or 2 bits
Error detection (See note.) V ertical parity (none, even, or odd) (See note.)
Block check character (BCC)
Flow control Not supported.
Interface RS-485
Retry function Not supported.
Communications buffer 40 bytes
Reading and writing from H8GN Reading present value and totalizing count value; reading/writing preset and set values;
switching between SV-banks; switching between communications
write-enabled/write-prohibited; reading/writing other initial and advanced function setting
parameters
Note: The baud rate, data bit length, stop bit length, and vertical parity can be individually set using the communications setting level.

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8
Nomenclature
No. 2 Display
Displays set value or
set value of the
parameter.
Displays the
rightmost 4 digits of
the count value (8
digits) when the
H8GN is used as a
totalizing counter .
(Zeros suppressed)
Operation display 2
5 h 30 min
123.4 s
Flashes while timer is on 0.0 min,
0 h 00 min, 0.0 h, or 0 h.
No. 1 Display
Displays the present value or parameter type.
When totalizing count is displayed, the
leftmost 4 digits of the 8-digit totalizing count
will be displayed. (Zeros suppressed)
Operation display 1
Level Key
Press this key to select the setup
level. The setup level is selected in
order “operation level” ←→
“adjustment level”, “initial setting
level” ←→ “communications setting
level”.
Mode Key
Press this key to select
parameters within each
level.
Down Key
Each press of this key decreases
values displayed on the No. 2
display . Hold down this key
continuously to decrease values
quickly . Also returns setting
items.
Up/Reset Key
Each press of this key
increases values
displayed on the No. 2
display . Hold down this
key continuously to
increase values quickly.
Also advances setting
items.
Reset Function
T o reset the present
value, press this key
while the present value
is displayed.
If this key is pressed
while the totalizing
count value is
displayed, the totalizing
count value and the
present value will be
reset.
Indicator Meaning
CMW
Lit when communications writing is enabled.
RST Lit during reset using reset input or Reset Key .
OUT
Lit when control output is ON.
TOTAL Lit when totalizing count value is displayed.
Displays the time unit when the
timer function has been selected.
Example

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9
Operation
Block Diagram
Communications
circuit
(Functional
insulation)
Input circuit
Internal
control circuit
Power supply
circuit
(Basic
insulation)
Output circuit
(Basic
insulation)
Display circuit
Key switch
circuit
I/O Functions
Inputs Counter inputs
CP1/CP2 •
Receive count signals.
• Receive increment, decrement, individual, and quadrature inputs.
•In increment mode and decrement mode, CP1 is used for the count input and CP2
is used for count prohibit input.
Reset •
Resets the present value. (T otalizing count value is not reset.)
(In increment mode or increment/decrement mode, the present value returns to 0;
in Decrement Mode the present value returns to the set value.)
• The count input is not received during resetting.
• The RST indicator is lit during resetting.
T imer inputs
Start •
Starts timing.
Reset •Resets the timer. (In elapsed time mode the time returns to 0; in remaining time
mode,
the time returns to the set value.)
• During resetting, timing stops and the control output turns OFF .
• The RST indicator is lit during resetting.
Gate •
Prohibits timing operation.
Outputs OUT •Output
made according to the output mode setting when the set value is reached.

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10
Initial Setup
The and Keys are used to switch between setup menus, and the amount of time that you hold the keys down for determines which
setup menu you move to. This section describes two typical examples.
Note: In the following sections, “PV” is used to indicate a present value and “SV” to indicate a set value.
1. Using the H8GN as a Counter
Typical Application Examples
Typical Application
•Setup Procedure
1. Changing Set V alues
2. Displays
Set value and selections in each
display can be changed by pressing
the and Keys.
No. 1 display No. 2 display
Power ON Power ON
Operation Level
Check Counter/
T imer selection
Set input mode
Set output mode
Check counting
speed
Check input
signal width
Set SV
Reset PV
Start operation
Set values are ef fective two seconds after key operation is stopped or when the
or Key is pressed.
Operate
Operation Level
Initial Setting Level
Press the Level Key for at
least 3 s. Operation stops.
Check Counter/Timer
selection
Use the and
Keys to set the input mode
to individual mode.
Use the and
Keys to set the output mode
to F.
Check the counting speed.
Check the input signal width. Input signal width:
Counting speed:
Output mode:
Input mode:
Function:
Press the Level Key for at
least 1 s.
Operation starts.
Press the and
Keys to change the set
value to 100.
Press the Key .PV:
PV/SV:
Input mode Individual input
Output mode F (overcount)
Counting speed 30 Hz
Input signal width 20 ms
Decimal point None
Prescale None
•Confirming Set Values
Present value (PV)/
set value (SV)

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11
2. Using the H8GN as a Timer
Typical Application Examples
Typical Application Examples
1. Changing Set V alues
2. Display
Set value and selections in each
display can be changed by pressing
the and Keys.
No. 1 Display No. 2 Display
Power ON
Power ON
Operation Level
Set Counter/T imer
selection
Set time range
Check timer mode
Check output mode
Check output time
Set SV
Reset PV
Set values are ef fective two seconds after key operation is stopped or when the
or Key is pressed.
Operate
Operation Level
Initial Setting Level
Present value (PV)/
set value (SV)
Press the Level Key for at
least 3 s. Operation stops.
Use the and
Keys to select the timer
function.
Use the and
Keys to set the time range to
999.9 s
Use the and
Keys to set the timer mode to
remaining time.
Check the output mode.
Check the output time.
Output time:
Output mode:
Timer mode:
Time range:
Function:
Press the Level Key for at
least 1 s. Operation starts.
Use the and
Keys to set the SV to 10.0.
Press the Key .PV:
PV/SV:
Time range 0.0 to 999.9 s
T imer mode DOWN (remaining time)
Output mode A mode
Output time Hold
Input signal width 20 ms
Check the input signal width. Input signal width:
Check input signal
width
Start operation
•Setup Procedure
•Confirming Set Values

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12
Setting Specifications after Turning ON Power
Outline of Operation Procedure
Key Operation
In the following descriptions, all the parameters are introduced in the display sequence. Some parameters may not be displayed depending on
the protection settings and operating conditions.
Power ON
Operation level
Adjustment level
Protect level
Operation stops
Communications
setting level
1 s. min.
Initial setting level
Advanced function
setting level
Operation in progress
Operation stopped
Not displayed depending on model and settings.
Not displayed depending on model and settings.
Level change
3 s min.
less than 1 s.
3 s. min. (default value)
Keys 1 s. min.
less than 1 s.
1 s. min.
Password input set value “–169”
+
+
Key Key
Key
Keys
Key
Key
Note: Of these levels, the initial setting level, communications setting level, and advanced function setting level can be used only when op -
eration has stopped. Control output is stopped when these three levels are selected. When switched back to the operation level from
one of these levels, operation will start.
Description of Each Level
Operation Level
•This level is displayed when you turn the power ON. You can
move to the protect level, initial setting level, and adjustment
level from this level.
•Normally , select this level during operation.
•During operation, the present value, set value, totalizing count
value, and setting number of SV-bank can be monitored using
the
Key.
Adjustment Level
•To select this level, press the Key once for less than one
second.
•This level is for entering set value (SV 0 to 3) for operation. This
level contains parameters for communications writing enable/
disable,
set value of SV -bank, and cycle time (timer Z mode).
•You can move to the top parameter of the operation level, protect
level, or initial setting level from here.
Initial Setting Level
•To
select this level, press the Key for at least three seconds
in the operation level or adjustment level.
•This level is for selecting the function, input mode, time range,
timer mode, output mode, output time, counting speed, input
signal width, decimal point position, prescale value, and
rising/falling
edge for input signal.
•You can move to the advanced function setting level or
communications setting level from this initial setting level. To
return
to the operation level, press the Key for at least one
second. T o move to the communications setting level, press the
key once for less than one second.
Protect Level
•To select this level, simultaneously press the and
Keys for at least three seconds (default value). This level is to
prevent unwanted or accidental modification of parameters.
Protected
levels will not be displayed, and so the parameters in
that level cannot be modified.
Communications Setting Level
•To select this level, press the Key once for less than one
second in the initial setting level. When the communications
function
is used, set the communications conditions in this level.
Communicating with a personal computer (host computer)
allows
set values to be read and written.
Advanced Function Setting Level
•To
select this level, you must change the initial settings/commu -
nications protection setting in the protect level to “0” and then
enter
the password (“-169”) in the initial setting level.
•This level is for initializing settings, enabling SV-bank and
totalizing counter use, setting display auto-return time, and
move-
to-protect-level time.
•Y ou can move to the initial setting level from this level.

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13
Parameters
Operation Level
(1) PV/SV
(2) PV
(3) T otalizing count value
(4) SV-bank
1. PV/SV
This display appears when the power is turned ON. No. 1 display
shows the present value and No. 2 display shows the set value.
The values displayed will be determined by the settings for
Counter/Timer selection, time range, timer mode, and decimal
point
position made in the initial setting level.
Use the and Keys to change the settings.
2. PV
No. 1 display will show the present value and No. 2 display will
remain blank. The values displayed will be determined by the
settings for Counter/Timer selection, time range, timer mode,
and
decimal point position made in the initial setting level.
Press the Key to reset the present value.
3. T otalizing Count Value
The totalizing count value is displayed only if “totalizing
counter used” in the advanced function setting level has
been set to ON.
The
leftmost four digits of the 8-digit totalizing count value will be
shown in No. 1 display and the rightmost four digits will be shown
in No. 2 display .
TOTAL
=T otalizing count value: 12,345,687
Press the Key to simultaneously reset the
totalizing count value and the present value.
PV 0→1→2→3→0→1→2→0→1→2
T
otalizing count value 0→1→2→3→3→4→5→0→1→2
Key
during PV
display
Key during
totalizing count
value display
Refer to Input/Output Mode Settings on page NO T AG for in -
formation
on totalizing counter operation.
4. SV-bank ( m-sp)
SV-bank
is displayed only when “SV -bank used” in the ad -
vanced function setting level has been set to ON.
Select the SV -bank (SV 0 to 3). T o use the SV -bank function, the
four set values (SV 0 to 3) can be set beforehand in the adjust -
ment level. The keys on the front of the Unit can then be used
during operation to switch between the set values. For models
with built-in communications, communications can be used to
switch
between the set values.
SV
Switch between SV
Adjustment Level
(1) Communications writing control
(2) SV 0
(2) SV 1
(2) SV 2
(2) SV 3
(3) Cycle time
1. Communications W riting Control (cmwt)
Communications writing control is displayed only for mod -
els
with communications.
Allows or prohibits communications to write data from a personal
computer (host computer). Communications can be used to read
data regardless of this setting.
2. SV 0 to 3 (sp-0, sp-1, sp-2, sp-3)
SV 0 to 3 is displayed only when “SV -bank used” in the ad -
vanced
function setting level has been set to ON.
Used to set the set value when the SV -bank function is used. The
operator can use the keys on the front to switch between the set
values (SV 0 to 3). When the set value is changed in operation
mode, the set value (SV 0 to 3) set in the adjustment level for SV -
bank
will also change.
3. Cycle T ime (cyti)
Cycle time is displayed only when the “output mode for tim -
er
function” in the initial setting level has been set to “Z.”
Sets the cycle time used for ON/OFF-duty adjustable flicker
mode (Z). Cyclic control can be performed easily in ON/OFF-
duty
adjustable flicker mode by first setting the cycle time in the
adjustment level and by using the set value in operation level to
change the ON-duty ratio.
Controlling the flowrate by opening and closing the
electromagnetic valve by pulse control.
ON duty (%)
Control output
Cycle time
Close Open
Cycle time passed
Set ON duty rate
as a percentage
ON duty can be changed like an analog input
by using the Up and Down Keys.
Valve
ON duty
Fully closed to
fully open
0% to 100%
Refer to Input/Output Mode Settings on page NO T AG for in -
formation
on ON/OFF-duty adjustable flicker mode operation.

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14
Initial Setting Level
(1) Counter/Timer selection
(2) Input mode
(3) T ime range
(4) T imer mode
(5) Output mode for counter function
(6) Output mode for timer function
(7) Output time
(8) Counting speed
(9) Input signal width
(10) Decimal point position
(1 1) Prescale value
(12) Input signal edge
(13) Move to advanced function setting level
1. Counter/T imer Selection (func)
Select to use the H8GN as either a counter or a timer .
2. Input Mode (cntm)
The input mode is displayed only when “Counter/Timer
selection”
in the initial setting level has been set to counter .
When the H8GN is to be used as a counter, select increment,
decrement,
individual, or quadrature for the input mode. If incre -
ment or decrement is selected, the input signal edge for CP1
(count
input) can be switched using the input signal edge setting.
Refer to Input/Output Modes and Count Values on page
NO TAG
for information on input mode operations.
3. T ime Range (timr)
The time range is displayed only when “Counter/Timer
selection”
in the initial setting level has been set to timer .
When
the H8GN is to be used as a timer , set the time range to be
timed.
4.
T imer Mode (timm)
The timer mode is displayed only when “Counter/Timer
selection”
in the initial setting level has been set to timer .
When
the H8GN is to be used as a timer , set the elapsed or re -
maining
time mode.
5. Output Mode for Counter Function (outm)
The output mode is displayed only when “Counter/Timer
selection”
in the initial setting level has been set to counter .
When the H8GN is to be used as a counter , set the output mode.
Refer to Input/Output Mode Settings on page NO T AG for in -
formation
on output mode operations.
6. Output Mode for T imer Function (outm)
The output mode is displayed only when “Counter/Timer
selection”
in the initial setting level has been set to counter .
When
the H8GN is to be used as a timer , set the output mode.
Refer to Input/Output Mode Settings on page NO T AG for in -
formation
on output mode operations.
7. Output Time (otim)
The output time is displayed only when “output mode for
counter
function” in the initial setting level has been set to C
or K or when “output mode for timer function” in the initial
setting level has been set to A or B .
When using one-shot output in the H8GN, set the output time for
the one-shot output (0.01 to 99.99 s).
One-shot output can be used only when the C or K output mode
is selected for counter function or A or B output mode is selected
for timer function.
If the output time is set to “0” when selecting timer function, the
output will be held. The output time cannot be set to “0” for count -
er
function.
8. Counting Speed (cnts)
The counting speed is displayed only when “Counter/T imer
selection” in the initial setting level has been set to counter .
When the H8GN is used as a counter, the operator can switch
between
maximum counting speeds (30 Hz/5 kHz) for CP1 and
CP2.
Set
to 30 Hz when using a contact for the input signal. When the
counting speed is set to 30 Hz, input signal chattering is re-
moved.
9.
Input Signal W idth (iflt)
Switches between minimum input signal widths (20 ms/1 ms) for
start, reset and gate inputs. All input signal widths are set togeth -
er
via external input.
When the counter function is selected, only the reset input is set,
but when the timer function is selected the start, gate, and reset
inputs are all set together .
Set
to 20 ms when using a contact for the input signal. When the
input signal width is set to 20 ms, input signal chattering is re-
moved.
10.
Decimal Point Position (dp)
The decimal point position is displayed only when “Count -
er/Timer
selection” in the initial setting level has been set to
counter.
This
determines the decimal point position for PV , SV, SV -bank
(SV 0 to 3), and totalizing count values. Press the Key to
move the decimal point to the left and press the Key to
move it to the right.
1 1. Prescale V alue (pscl)
The prescale value is displayed only when “Counter/T imer
selection”
in the initial setting level has been set to counter .
Converts
the counter input pulse to any value within the setting
range (0.001 to 9.999).

H8GN H8GN
15
Example: T o have a display of jj.jj m for a system that out -
puts
25 pulses when the object has been moved forward 0.5 m,
perform the following steps.
1. Set the decimal point position to before the second-last digit.
2. Set the prescale value to 0.02 (0.5 ÷ 25).
Encoder
25 pulses
12. Input Signal Edge (edge)
The input signal edge will be displayed only when the “input
mode” at the initial setting level has been set to increment or
decrement.
Switches
the CP1 input edge when the H8GN is used as an in -
crementing
or decrementing counter . In the counter increment or
decrement modes, CP2 will function as the gate input and CP1
counting will be prohibited while CP2 is ON.
Refer to Input/Output Modes and Count Values on page
NO TAG
for information on input mode operations.
13. Move to Advanced Function Setting Level (amoU)
This will be displayed only when the “initial setting/commu -
nications
protection” in protect level is set to 0.
This setting enables the advanced function settings to utilize the
counter/timer functions to the maximum. To move to the ad-
vanced function setting level, enter the password (–169) from
the
initial setting level.

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16
Advanced Function Setting Level
(1) Parameter initialization
(2) SV -bank used
(3) T
otalizing counter used
(4) Display auto-return time
(5) Move-to-protect-level time
1. Parameter Initialization (init)
Used to return all settings to default values.
Turn ON parameter initialization and shift to another display to
return
all settings to default values.
2. SV-bank Used (nspu)
Set “SV -bank used” to ON and operate the keys from the panel to
switch between SV 0 to 3.
To use the SV -bank function, the set value (SV 0 to 3) must be set
beforehand in the adjustment level. These set value are then
used during operation by operating the keys on the front of the
Unit.
3.
T otalizing Counter Used (tcnu)
Set totalizing counter use to ON to display and enable use of the
totalizing counter in the operation level.
The totalizing counter displays the leftmost four digits of the
8-digit totalizing count on No. 1 display and the rightmost four
digits
on No. 2 display to enable 8-digit counting.
4. Display Auto-return T ime (ret)
If this function is used, the display in the operation and adjust-
ment levels will automatically return to the PV/SV display if no
key operations have been made for the set period. (setting
range:
1 to 99 s.)
The time before auto-return of the display can be set here. If this
setting is set to OFF , the auto-return function will not operate.
5. Move-to-protect-level T ime (prlt)
If the and Keys are pressed for more than 3 seconds
in the operation level, the display will move to the protect level.
Use this setting to change the time that the key must be pressed
to any time within the setting range (3 to 30 s).
Protect Level(1)
Operation/Adjustment Protection
Restricts menu display and writing in the
operation and adjustment levels.
(2) Initial Setting/Communications Protection
Restricts menu display and moving to the
initial setting level/communications setting
level/advanced function setting level.
(3) Setting Change Protection
Restricts setting changes using front panel
keys.
(4) Reset Key Protection
Restricts use of the Reset Key .
1. Operation/Adjustment Protection (oapt)
The following table shows the protection given for each setting
level.
Setting
level
Operation level
Adjustment
ll
Se gee
PV/SV Other
djus e
level
0 Not protected Not protected Not protected
1 Not protected Not protected No display ,
no level shift
2 Not protected No display ,
no level shift
No display ,
no level shift
3 Display only No display ,
no level shift
No display ,
no level shift
Not protected: Display and setting changes are possible.
Display only: Display is possible.
No display, no level shift: Display and level shifts are not pos-
sible.
The
initial setting level is 0 and no protection is given at this set -
ting
level.
2. Initial Setting/Communications Protection (icpt)
Moving to initial setting, communications setting, or advanced
function
setting levels is restricted.
Setting Initial setting
level Communications setting level
Advanced
function
setting level
0 OK OK OK
1 OK OK NO
2 NO NO NO
OK: Move to other levels possible
NO: Move to other levels not possible
The default setting is 1.
3. Setting Change Protection (wtpt)
Restricts setting changes using front panel keys.
Setting Meaning
OFF Settings can be changed by key operation.
ON Settings cannot be changed by key operation.
(Only protect level settings can be changed.)
The default setting is OFF .
4. Reset Key Protect (rpt)
Prohibits the use of the Reset Key .
Setting Meaning
OFF PV and totalizing count values can be reset by
the Reset Key .
ON PV and totalizing count values cannot be reset
by the Reset Key.

H8GN H8GN
17
The default setting is OFF .

H8GN H8GN
18
Communications Setting Level
The communications specifications are set in the communications
setting level. Make the individual communications settings from the
front panel.
The communications parameters and their settings are listed in the
following table.
Parameter Display Settings Set value
Communications
unit number
uno 0 to 99
0 / 1 to 99
Baud rate bps 1.2, 2.4,
4.8, or
9.6 (kbps)
1.2 / 2.4 / 4.8 / 9.6
Communications
data length
len 7/8 (bits)
7 / 8
Stop bits sbit 1/2
1 / 2
Parity prty None,
even, or
odd
none / euen /
odd
Note: 1. The settings shown in reverse video are the default set -
tings.
2. Settings made in the communications setting level are
enabled
when the power is turned ON again.
Before performing communications, perform the following proce-
dure
with the front panel keys to set the communications unit num -
ber, baud rate, and other settings. Refer to the communications
manual
for operation methods for other communications settings.
1. Press the Key for at least 3 seconds and move from the
operation level to the initial setting level.
2. Press the Key and move from the initial setting level to
the communications setting level.
3. Press the Key to change the settings items as shown
below.
4. Use the and Keys to change the settings data.
(1) Communications unit number
(2) Baud rate
(3) Communications data length
(4) Stop bits
(5) Parity
Align each communications setting with the settings on the personal
computer or other communications device.
1. Communications Unit Number (u-no)
When communicating with a host computer , set a unit number to
enable the host computer to identify each unit. The number can
be set in a range from 0 to 99 in increments of 1. The default unit
number is 1. When using multiple units, the units will not function
normally if the same unit number is set for more than one unit.
2. Baud Rate (bps)
Set the baud rate for communications with the host computer.
The
settings correspond to the following baud rates.
1.2 (1,200 bps), 2.4 (2,400 bps), 4.8 (4,800 bps), and 9.6
(9,600 bps).
3. Communications Data Length (len)
The communications data length can be changed to either 7 or 8
bits.
4.
Stop Bits (sbit)
The stop bits can be set to either 1 or 2.
5. Parity (prty)
The parity can be set to none, even, or odd.

H8GN H8GN
19
Parameters
Power ON
Operation level Adjustment
level Protect level
Communications
setting level
Initial
setting
level
Advanced
function setting
level
Password input
set value “–169”
1 s. min.
1 s. min. 3 s. min.
less than 1 s. Keys 1 s. min.
Keys
+
+
Operation in progress
No display due to model and settings
Operation stopped
No display due to model and settings
Level change
Advanced function setting level
Parameter
initialization
Use
SV-bank
Use
totalizing
counter
Display
auto-return
time
Move-to-
protect-
level time
When
counter
selected
: Initialize
: Not initialize
: Use
: Not use
: Use
: Not use
: No auto-return
: 1 to 99 s.
: 3 to 30 s.
less than 1 s.
Key 1 s. min.
Password input
(–169) and move
When
counter
selected Input
mode
Counter/
Timer
selection
Initial setting level
Key 1 s. min.
When
using
SV-bank
When
totalizing
counter
selected
Key 3 s. min.
Key 1 s. min. Operation
level
Key less than 1s.
Power ON
PV/SV
PV
Totalizing
count value
SV-bank
Press the Key to reset
the totalizing count value and
the PV simultaneously
Press the Key to
reset the PV.
See note 1.
Time
range
Timer
mode
Output
mode for
counter
Output
mode for
timer
When
timer
selected
When
counter
selected
When
timer
selected
See note 2.
: Counter
: T imer
: Increment
: Decrement
: Individual
: Quadrature
: Elapsed time
: Remaining time
: N
: F
: C*
: K*
: A*
: B*
: D
: E
: F
: Z
When the
above C*,
K*, A*, or
B* mode
selected
Output
time
Counting
speed
Input signal
width (start,
reset, gate)
When
counter
selected
When
counter
selected
When
increment
or
decrement
selected in
counter
input mode
See note 3. Move to advanced function setting level.
Input
signal
edge
Prescale
value
Decimal
point
position
: Counting on rising edge
: Counting on falling edge
: 30 Hz
: 5 kHz
Counter
Timer
Output will be held if output time is 0.
Output time cannot be set to 0 when
counter function is selected.
: 0.01 to 99.99 s
: 0.00 to 99.99 s
: 20 ms
: 1 ms
: 0
: 0.0
: 0.00
: 0.000
: 0.001 to 9.999
: SV 0
: SV 1
: SV 2
: SV 3
Key
Key
3 s. min. (default value)
Key
Key
Key
Note : The parameters shown in reverse video are
the
default settings.

H8GN H8GN
20
Adjustment level
Models with
communications
When using
SV-bank
When timer
output mode
Z is selected Cycle time
SV 3
SV 2
SV 1
SV 0
Communic
ations
writing
See note 1.
See note 1.
See note 1.
See note 1.
See note 1.
: Enabled
: Disabled
Key for more than set time (The default setting is 3 s.)+
+
Key for 1 s. min.
Protect level
Operation/
adjustment
protection
Initial
settings/
communic
ations
protection
Setting
changes
protection
Reset Key
protect
: Level 0
: Level 1
: Level 2
: Level 3
: Level 0
: Level 1
: Level 2
: No key-operated
setting changes
: Key-operated setting
changes allowed
: Reset Key disabled
: Reset Key enabled
Communications setting level
Models with
communications
Communic
ations Unit
No.
Baud rate
Data
length
Stop bits
Parity
: 0 to 99
: 1,200 bps
: 2,400 bps
: 4,800 bps
: 9,600 bps
: 7 bits
: 8 bits
: 1 bit
: 2 bits
: None
: Even
: Odd
Note : Settings made in the communica-
tions
setting level are enabled when
the power is turned ON again.
/
Note: 1. Counter (increment or decrement)
: –999 to 9999
Counter (individual or quadrature)
T imer (cycle time or mode other than output mode Z)
: 0 to 9999
: 0.000 to 9.999 s
: 0.00 to 99.99 s
: 0.0 to 999.9s, min, h
: 0 to 9999 s, h
: 0 min 00 s to 99 min 59 s
: 0 h 00 min to 99 h 59 min
T imer (output mode Z)
: 0% to 100% (ON duty)
2. T ime range
: -.---s
: --.--s (default)
: ----h
: ---.-h
: --h--min
: ---.-min
: --min--s
: ----s
: ---.-s
3. Displayed when level 0 is selected for initial setting/
communications protection in the protect level.

H8GN H8GN
21
Operating Mode
Input/Output Modes and Count Values
Up (Increment) mode Down (Decrement) mode
Input
edge UP CP1: Count input CP2: Count prohibit input
Count
Count
prohibit
CP1: Count input CP2: Count prohibit input
Count
n
n–1 n–2
n–3
n–4
n–5
Count
prohibit
DO
WN CP1: Count input CP2: Count prohibit input
Count
Count
prohibit
CP1: Count input CP2: Count prohibit input
Count
Count
prohibit
n
n–1 n–2
n–3
n–4
n–5
Up/Down B Individual input
Count
Up/Down C quadrature input
Count
Note: 1. (A) indicates the minimum signal width and (B) requires at least 1/2 the minimum signal width. If these conditions are not met, a
counting error (+1 or –1) may occur .
2.
The following table explains the L and H symbols in the above graphics.
Symbol Input
HShort-circuited
LOpen

H8GN H8GN
22
Input/Output Mode Settings
Counter Function
Input mode
Up Down Up/Down B.C
Output
mode N
9999
0
–999
Reset
SV
Output
F
9999
0
–999
Reset
SV
Output
C
9999
0
–999
Reset
SV
Output
tt t t t–a t tt–a t
K
9999
0
–999
Reset
SV
Output
t–a t t–a t–a tt–a t
Note: 1. t: output time. t – a < t : Less than the output time.
2. If there is a power failure during output ON, output will turn ON again when the power supply has recovered. For one-shot output, an
output will be made again for the duration of the output time setting once the power supply has resumed.
3. Output timing restarted during one-shot outputs is ignored.
Totalizing Counter Operation
Reset
Totalizing
count reset
(reset key)
PV
Totalizing
count value
•Totalizing counter continues to count the
present value, regardless of whether an reset
input
(by the reset key) has been made to reset
the PV.
•When totalizing count value is reset, the PV is
reset at the same time.
•The totalizing count range is 0 to 99,999,999. If
the totalizing count exceeds 99,999,999, the
count
returns to 0. If the count drops below 0, it
becomes 99,999,999.