|
N.B. The easiest way to read or write relay settings
is to use the MultiView
program
Send relay channel’s parameters (function 42)
For M550/M560/M570 transducers, the write functions require the
General
Pass Code to be valid.
Sends
8, 16 byte structures representing the parameters for the 8 conditions
that can be attached to each relay installed.
Format-
[node number][2Ah][register start(2 bytes)][number of registers(2
bytes)][number of bytes][<-8, 16 byte structures + 1 relay actions
+ 1 padding byte (130 (82h) bytes of data)->][crc(2 bytes)]
One of the
8, 16 byte structures to send to the M550/M560/M570 is defined below.
|
Byte
#
|
Name
|
Usage
Type |
|
|
0
|
SetPoint
Percentage of range value |
unsigned
char |
? |
|
1
|
Differential
Percentage of range value |
unsigned
char |
? |
|
2
|
Measurements
N/A (send NULL) |
array
pointer |
|
|
3
|
Under/Over
0 = Over 1 = Under 2 = window |
unsigned
char |
? |
|
4
|
Channel
Control N/A (send NULL) |
unsigned
char |
|
|
5
|
Number
In Group N/A (send NULL) |
unsigned
char |
|
|
6
|
Timer
N/A (send NULL) |
unsigned
int |
|
|
8
|
Delay
Time 1 = 40ms, 2 = 80ms etc. |
unsigned
int |
? |
|
10
|
Logic
Of Group Any 1, 2, or 3, Sum or Average |
unsigned
char |
? |
|
11
|
ID
V/I/Hz value etc |
unsigned
char |
? |
|
12
|
Set-point
0=not assigned, 254=assigned |
unsigned
char |
? |
|
13
|
Physical
Relay Number of attached relay |
unsigned
char |
? |
|
14
|
Spare1
N/A (send NULL) |
unsigned
char |
|
|
15
|
Spare2
N/A (send NULL) |
unsigned
char |
|
In
addition to sending the 8 structures, two bytes must be appended
to the packet.
1st byte)
A
one-byte bit pattern, where each bit is mapped to one physical relay,
(bit 0 = Relay 1, bit 1 = Relay 2 etc.)
If a bit is reset (0), the corresponding relay’s function is
to operate on exceptions.
If set
(1) it will release.
2nd Byte)
A NULL byte for padding.
Write Sample Coding
Retrieve relay
channel’s parameters (code 41)
Only applicable to the M550/M560/M570 (firmware revision 0.3.01.00-03-09-04
and later).
Requests 8, 16 byte structures representing the parameters for the
8 conditions that can be attached to each relay installed.
Format-
[node address][2Bh][register start(2 bytes)][number of registers(2
bytes)][crc(2 bytes)]
[05][2B][0000][0041][E478]
One of the 8, 16 byte structures read from the M550/M560/M570 is
defined below.
|
Byte
#
|
Name
|
Usage
Type |
|
|
0
|
SetPoint
Percentage of range value |
unsigned
char |
? |
|
1
|
Differential
Percentage of range value |
unsigned
char |
? |
|
2
|
Measurements
N/A |
array
pointer |
|
|
3
|
Under/Over
0 = Over 1 = Under 2 = window |
unsigned
char |
? |
|
4
|
Channel
Control 0 = no exception, 1 = exception |
unsigned
char |
? |
|
5
|
Number
In Group 1, 2 or 3 |
unsigned
char |
|
|
6
|
Timer
N/A |
unsigned
int |
|
|
8
|
Delay
Time 1 = 40ms, 2 = 80ms etc. |
unsigned
int |
? |
|
10
|
Logic
Of Group 1, 2, 3, 128(Sum) or 129(Avg) |
unsigned
char |
? |
|
11
|
ID
V/I/Hz value etc |
unsigned
char |
? |
|
12
|
Set-point
0=not assigned, 254=assigned |
unsigned
char |
? |
|
13
|
Physical
Relay Number of attached relay |
unsigned
char |
? |
|
14
|
Spare1
N/A |
unsigned
char |
|
|
15
|
Spare2
N/A |
unsigned
char |
|
In addition
to receiving the 8 structures, two bytes will be appended to the
packet.
Byte 1)
A
one-byte bit pattern, where each bit is mapped to one physical relay.
If a bit is reset (0), the corresponding relay’s function is
to operate on exceptions. If set (1) it will release.
Byte 2) A NULL byte for padding.
Read Sample Coding
|