Eurotherm 6100, User Manual

Page: 286 / 397

100/180MM DISTRIBUTED GRAPHIC RECORDER: USER GUIDE
HA029324
Issue 11 Oct 14 User Guide
Page 270
Byte 0
Transaction
identifier
Transaction
identifier
Protocol
identifier
Protocol
identifier
Byte 1 Byte 2 Byte 3 Byte 4
Number of
bytes fol-
lowing (hex)
Byte 5
Always 00
Byte 6
Recorder
Modbus
address
Byte 7
Modbus
function
code (hex)
00 00 00 00 00 13 01
Byte 8
Byte 9 Byte 10 Byte 11
Byte 12 Byte 13 Byte 14 Byte 15 Byte 16 Byte 17 Byte 18 Byte 19 Byte 20
Byte 21 Byte 22 Byte 23
10 CC
Start
address
high
Start
address low
No. of regis-
ters high
No. of reg-
isters low
Byte count
30
ASCII
E (Hex)
45
Null Password
High
Byte
0C
00 06
ASCII
n (Hex)
6E
ASCII
g (Hex)
67
ASCII
i (Hex)
69
ASCII
n (Hex)
6E
ASCII
e (Hex)
65
ASCII
e (Hex)
65
ASCII
r (Hex)
72 00 HH
User name (as configured in instrument. Must be followed by null character (Hex 00)
Byte 24
Null
00
Password
Low
Byte
HH HH
Null character inserted only, if
otherwise, the Byte count in
Byte 12 would be Odd.
Byte 6
Slave
identifier
MODBUS
function
code (hex)
00
Byte 0 Byte 1 Byte 2 Byte 3 Byte 4 Byte 5
10 CC
Start
address
high
Start
address low
No. of regis-
ters high
No. of reg-
isters low
30 00 06
Byte 7 Byte 8 Byte 9 Byte 10 Byte 11
Byte 12 Byte 13 Byte 14 Byte 15 Byte 16 Byte 17 Byte 18 Byte 19 Byte 20
Byte count
(excluding
CRC)
ASCII
E (Hex)
45 0C
ASCII
n (Hex)
6E
ASCII
g (Hex)
67
ASCII
i (Hex)
69
ASCII
n (Hex)
6E
Null Password
High
Byte
ASCII
e (Hex)
65
ASCII
e (Hex)
65
ASCII
r (Hex)
72 00 HH
Null
00
Password
Low
Byte
HH HH
Null character inserted only if
without it, the Byte count in
Byte 6 would be Odd.
CRC low
Byte
HH HH
CRC high
Byte
8.2.4 SECURITY (Cont.)
TO SEND A LOGIN REQUEST
Request
Figure 8.2.4a shows data transmission sequence for sending a login request to a recorder with Modbus address
1, using the Ethernet network connection. Figure 8.2.4b is the same message for use with serial communica-
tions
Figure 8.2.4a Login request via Ethernet (Modbus TCP)
Figure 8.2.4b Login Request using a serial transmission line.
Notes:
1 The high and low password bytes are entered using the result of the encryption program above. If
the password is blank, both High and Low Bytes must be 00 (null).
2 For successful login, the ‘Connect from remote’ item must be enabled (ref. ‘Access levels in section 4.4.1 ).