COMMUNICATION MEDIA
Typical Modbus Network
Pl70
Showing Placement of J375 Modbus Adapter Within Network
Two Possible Mounting Configurations
SPECIFICATIONS
EIA RS-232-C Signals Supported
1.
Transmitted Data (TXD). an output from
the
J375
2. Received Data (RXD), an input to
the
J375
3. Request
to Send (RTS), an output from the J375
4. Clear to Send (CTS), an input to the J375
5. Data Set Ready (DSR), an input to the J375
6. Data Terminal Ready (DTR), an output from the J375
Function
Sub-
Not
Codes
Functions
Descrlstlon
Suppofled Supported
6
Set Single Register
7
Read Exception
Status
8 0 Loopback
1
Initiate Comm
Restart
2
Return Diagnostic
Register
4
Force Listen Only
Mode
Program (484 PC
only)
Poll
(484
PC only)
Fetch Event Counter
Fetch Communica-
tions Event Log
x
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Modbus Compatibility
Baud Rate supported by J375
75 1,200
110
2.4or-I
134.5
l!iD
_, .__
4,800
.-_
300
9,600
600 19,200
Transmission mode, stop bits, and parity supported by J375
Parity Option Even Parity Odd Parity No Parity
,L
\
No.
of
J
Stop Bits 1
2 1
2 1 2
ASCII X X X
X
NS X
RTU
X
NS X NS X
NS
Function Sub.
Codes
Functions
9
10
11
12
13
14
15
16
Program
(18413641564 PC’s)
Poll (18413641584
PC’S)
Force Multiple
Coils
Set
MultiDIe
X = Supported
NS =
Not Supported
Not
Description
Supported Supported
Read Output Status
X
Read Input Status
X
I?
18
19’
Registers
Report
Slave ID
Program Commands
(Micro 64 PC)
(Gould Modicon
(Proprietary
Command)
Reset Link
X
X
Read Output
Command
Register
X
Read Input Register
X
‘Function Code 19 is a new function code. This code, via the Modbus
Force Single Coil
X
master software,
changes the values
of the system parameters set by
the dip switches.
Environment
Ambient Temperature
Operating
O’C to 60°C
Dimensions (W x H x D)
1.63 in x 10.50 in x 5.50 in
(41.40 mm x 266.70 mm x
139.70 mm)
Storage
- 40°C to + 85OC
Hum.idity
O-95% (non-condensing)
Weight
2 Ibs, 2.5 oz (0.978 kg)
NOTES
1.
Install as the last module in the l/O structure, if J378 modem not used.
2. Install anywhere wlthin the range of the Micro 84 cable (cable is 6 ft. long and interchangeable with P370 cable).
iii
GOULD
Electronics
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