User manual - METER SRT-457
Device do not reply to BROADCAST-type messages.
5.
Read of the registers 1, 2 and 3 in one message (example of reading a number of
registries in one frame):
ADDR
FUNC
REG H,L
COUNT H,L
CRC L,H
01
03
00
01
00
03
54
0B
COUNT L - the count of being read registers (max.16)
The answer:
ADDR
FUNC
BYTE C DATA H1,L1
DATA H2,L2
DATA H3,L3
CRC L,H
01
03
06
00
0A
00
00
00
01
78
B4
DATA H1, L1 - reg. 01h (10 - displayed value 1.0 ),
DATA H2, L2 - reg. 02h (0 - no errors),,
DATA H3, L3 - reg. 03h (1 - decimal point position 0.0 ).
There is no full implementation of the Modbus Protocol in the device. The
functions presented above are available only.
9.
DEFAULT AND USER'S SETTINGS LIST
Parameter
Description
Default value
User's value
Desc.
page
Parameters of relay R1 operation ( rEL1 menu)
SEtP
Relay R1 threshold
20.0
21
SEt2
Relay R1 second threshold
40.0
21
HYSt
Hysteresis of relay R1
0.0
21
modE
Operation mode of relay R1
on
21
t on
Turn on delay of relay R1
0.0
22
toFF
Turn off delay of relay R1
0.0
22
unit
Unit of
t on
,
toFF
parameters of relay R1
SEC
22
AL
Reaction for critical situation of relay R1
oFF
22
Parameters of LED R2 operation ( rEL2 menu)
SEtP
LED R2 threshold
40.0
21
SEt2
LED R2 second threshold
60.0
21
HYSt
Hysteresis of LED R2
0.0
21
33
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