ACR&Artex Float-Free 406 Memory Capsule - Manual (Page 33)

29 Y1-03-0202 Rev. E
13. Change IP Address and Subnet Mask Command Structure
The RLB-35MC’s IP address and subnet mask can be changed from the
factory set default values of 192.168.2.100 and 255.255.255.0, respectively,
in RLB-35MC Memory Board Software Version B and higher. The command
string is sixteen (16) bytes in length and has the same fixed command
header as the communications command string. The bytes are defined as
seen below:
yy 2 yy 2 yy 2 yy 2 AC 53 CA 35 xx 1 xx 1
F
ix
e
d
C
o
m
m
a
n
d
H
e
a
d
e
r
(H
E
X
)
O
p
e
ra
ti
o
n
C
o
m
m
a
n
d
O
p
e
ra
ti
o
n
a
l
S
u
b
C
o
m
m
a
n
d
N
e
w
I
P
A
d
d
re
s
s
M
S
B
N
e
w
I
P
A
d
d
re
s
s
3
rd
B
y
te
Null Termination 0x00 xx 1 xx 1
N
e
w
I
P
A
d
d
re
s
s
2
n
d
B
y
te
N
e
w
I
P
A
d
d
re
s
s
L
S
B
S
u
b
n
e
t
M
a
s
k
M
S
B
S
u
b
n
e
t
M
a
s
k
3
rd
B
y
te
S
u
b
n
e
t
M
a
s
k
2
n
d
B
y
te
S
u
b
n
e
t
M
a
s
k
L
S
B
00 00
N
u
ll
T
e
rm
in
a
ti
o
n
RLB-35MC Command Structure
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Byte
49 50
1)
2) The new subnet mask with the MSB of the 4-byte mask in byte 10 and the LSB in byte 13
The new IP address with the MSB of the 4-byte address in byte 6 and the LSB in byte 9
13.1. Header
The first four (4) bytes are a fixed value header with hexadecimal
values of AC, 53, CA, 35.
13.2. Operation Command
Byte 4 is the Operation Command of ‘I’ in ACSII format.
13.3. Operation Subcommand
Byte 5 is the Operation Subcommand of ‘P’ in ASCII format.
13.4. New IP Address
Bytes 6 – 9 are the new IP address arranged so the MSB of the 4-byte
IP address is in byte 6 and the LSB is in byte 9. Below is an example
of a new IP address of 192.168.2.75:
Byte
Position
Decimal Notation Hex Notation
6 192 0xC0
7 168 0xA8
8 2 0x02
9 75 0x4B