Installation manual

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4
4.3
Characteristics
Modicon TSX Micro
automation platform 0
Modbus Bus
Characteristics
Physical Interface TSX Micro terminal port
Non-isolated RS 485
PCMCIA card TSX SCY integrated port
for integrated
Premium RS 485
TSX 37 05/08 TSX
37 10/21/22
Isolated
RS 485 (1)
20 mA CL Non-isolated
RS 232D
TSX
SCY 11601
TSX
SCY 21601
Structure Type
Heterogeneous industrial bus
Method of access
Slave Master/slave Master/slave Type
Transmission Mode
Asynchronous in baseband
Frame
RTU RTU/ASCII
Data rate
1.2...14.2 Kbps 0.6..19.2 Kbps (for TSX SCP 111)
1.2... 19.2 Kbps (for TSX SCP 112/114)
1.2...19.2 Kbps
Medium
Double shielded twisted pair Double
shielded
twisted pair,
doubled
Quintuple
shielded
twisted pair
Double shielded twisted pair
Configuration Number of devices
28 max. in RS 485
Point-to-point in RS 422
16 max. 2
(point-to-point)
32
Max. number of link
addresses
98 248 98 248 98
Length of bus
10 m max. non isolated link
1,300 m max. on isolated link
(2)
1,300 m
excluding tap
links
100 to 1,000 m
according to
rate
15 m max. 1,300 m excluding C
Tap links
– 15 m max. – – 15 m
Services Requests
Bits: 1,920 bits per request
Words: 120 words per request
Security
One CRC 16 check parameter on each frame
Monitoring
No flow control Diagnostic counters, event counters
Modbus functions available
on Premium/TSX Micro PLCs or
on Atrium coprocessor
Code Modbus slave Modbus master
01 Read n output bits Read bits
02 Read n input bits Read input bits (3)
03 Read n output words Read words
04 Read n input words Read input words (3)
05 Write 1 output bit Write 1 bit or n bits
06 Write 1 output word Write 1 word or n words
07 Exceptional read status Exceptional read status
08 Diagnostic Diagnostic
0B Event counter Event counter
0C Event connection Event connection
0F Write n output bits –
10 Write n output words –
11 Identification Slave identification
– – Other requests accessible via SEND_REQ
generic function blocks
(1) Point-to-point RS 422 compatible connection.
(2) For an isolated link, you must use the TSX P ACC 01 terminal port cable connector.
(3) Requests not available on TSX 37 10/21/22 terminal port.
R
eferences:
p
ages 4/40 and 4/41
Courtesy of Steven Engineering, Inc. ● 230 Ryan Way, South San Francisco, CA 94080-6370 ● General Inquiries: [phone] ● www.stevenengineering.com
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