C-64
Preset Counter/Timer
H8GN
■
Communications Specifications
Note:
The baud rate, data bit length, stop bit length, and vertical parity can be individually set using the communications setting level.
■
Life-test Curve (Reference Values)
Resistive Load
Reference: A maximum current of 0.15 A can be switched at
125 VDC (cos
φ
= 1) and a maximum current of 0.1 A can
be switched if L/R is 7 ms. In both cases, a life of
100,000 operations can be expected. The minimum
applicable load is 10 mA at 5 VDC (failure level: P).
Connections
■
Block Diagram
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
Transmission code
ASCII
Data bit length (See note.)
7 or 8 bits
Stop bit length (See note.)
1 or 2 bits
Error detection (See note.)
Vertical 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 be-
tween SV-banks; switching between communications write-enabled/write-prohibited; reading/writing
other initial and advanced function setting parameters
1,000
700
500
300
100
70
50
01 2 3
4
30 VDC (cosφ = 1)
250 VAC (cosφ = 1)
Switching operations (×10
3
)
Load current (A)
Input circuit
Output circuit
Display circuit
Communications
circuit
(Functional
insulation)
(Basic
insulation)
(Basic
insulation)
Internal
control circuit
Power supply
circuit
Key switch
circuit
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