|
N.B. The easiest way to read or write relay settings
is to use the MultiView
program
Send relay channel’s parameters (function 103)
For M880
meters, the write functions require the
General
Pass Code to be valid if enabled.
Send 8,
16 byte structures.
Format-
[node number][67h][register start(2 bytes)][number of registers(2
bytes)][number of bytes]
[<-8, 16 byte structures + 1 relay actions + 1
backlight colour (130
(82h) bytes of data)->][crc(2 bytes)]
One of the
8, 16 byte structures to send to the M880 is defined below.
|
Byte
#
|
Name
|
Usage
Type |
|
|
0
|
SetPoint
Percentage of range value |
unsigned
char |
? |
|
1
|
Differential
Percentage of range value |
unsigned
char |
? |
|
2
|
Energy
Relay (send 254 to set relay to Energy) |
unsigned char |
|
|
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
|
Channel Status
send
0=not enabled, 254=enabled |
unsigned
char |
? |
|
13
|
Physical
Relay Number of attached relay |
unsigned
char |
? |
|
14
|
Energy Relay
Divisor (0 = /1, 1 = /10, 2 = /100, 3 = /1000) |
unsigned
char |
|
|
15
|
Energy Relay
Pulse Width (0 = OFF, 2 to 10 = 20ms to 200ms) |
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 at pulse time.
If set (1) it will release.
2nd Byte:
M880 Relay Alarm Colour
This byte should contain a value from 0
(off) to 7 to enable the backlight to display a colour each time the relay is activated.
Function
103 Sample Coding
Retrieve relay channel’s parameters (code 104)
Requests 8, 16 byte structures representing the parameters for the relay
channels.
Format-
[node address][68h][register start(2 bytes)][number of registers(2
bytes)][crc(2 bytes)]
One of the 8, 16 byte structures read from the M880 is defined below.
|
Byte
#
|
Name
|
Usage
Type |
|
|
0
|
SetPoint
Percentage of range value |
unsigned
char |
|
|
1
|
Differential
Percentage of range value |
unsigned
char |
|
|
2
|
Energy
Relay (reads 254 if relay is Energy) |
unsigned
char |
|
|
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
|
Channel Status
0=not enabled, 254=enabled |
unsigned
char |
|
|
13
|
Physical
Relay Number of attached relay |
unsigned
char |
|
|
14
|
Energy Relay
Divisor (0 = /1, 1 = /10, 2 = /100, 3 = /1000) |
unsigned
char |
|
|
15
|
Energy Relay
Pulse Width (0 = OFF, 2 to 10 = 20ms to 200ms) |
unsigned
char |
|
In addition
to receiving the 8 structures, two bytes will be appended to the
packet.
1st Byte:
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.
2nd Byte:
M880 Relay Alarm Colour
This byte contains a value from 0
(off) to 7 denoting the backlight colour displayed each time the relay is activated.
Function
104 Sample Coding
|