Transmission On Exceeding Of The Threshold, With Alarm Repetition - ADEUNIS sigfox MODBUS MASTER Guide Utilisateur

sigfox MODBUS MASTER - Guide utilisateur / User guide version V2.0.0

2.1.7 Transmission on exceeding of the threshold, with alarm repetition

The product sends alarm frame on exceeding thresholds and to repeat this alarm regarding a configurable period (register S320 x S329) while
the alarm is still active.
Product in standby
FR
Period
reached
EN
Slave(s) register(s)
reading
Threshold
overpassed
Send frame 0x45*
Alarm repeti-
tion activated
Repetition frame 0x45
every S320XS329
Turn to normal
?
Send frame 0x45*
There will be as many alarm frames transmitted as VALUE s read on the slave registers
exceeding the configured thresholds.
The settings associated with this mode of operation are:
•
•
•
•
No
•
?
•
•
Yes
•
E.g.:
Register Encoding
S320
No
S322
?
Yes
S350
No
S351
?
S352
Yes
S353
S354
IMPORTANT : alarms and thresholds are set to a maximum of 4 bytes (ie 2 maximum
Modbus registers).
For a value defined on one register, the user can choose the data type between unsigned
No
or signed 16-bit integer. For a value defined on 2 registers, the user can choose the type of
data between: unsigned 32-bit integer or signed 32-bit integer or unsigned 32-bit integer
(word swap) or signed 32-bit integer (word swap).
Yes
*The status byte «state of the alarm» inform you about if the alarm is active or not. This
information enables you to dissociate a 0x45 frame when the alarm is active or still active
from a frame 0x45 that informs you that the alarm is deactivated («back to normal»).
Acquisition period (register S320)
Supply time of the external load (slave) before the Modbus request (register 322)
Alarms configuration (registers S350, 355, 360, 365, 370, 375, 380, 385, 390, 395).
High threshold alarms (registers S351, 356, 361, 366, 371, 376, 381, 386, 391, 396).
Hysteresis of high threshold alarms (registers S352, 357, 362, 367, 372, 377, 382,
387, 392, 397).
Low threshold alarms (registers S353, 358, 363, 368, 373, 378, 383, 388, 393, 398).
Hysteresis of low threshold alarms (registers S354, 359, 364, 369, 374, 379, 384, 389,
394, 399).
Alarm repetition (register S329)
VALUE
Decimal 360
Decimal 200
Hexadecimal 0x0A106827 Alarm 1 configuration:
Hexadecimal 0x00124F80 High threshold of alarm 1 is 1,200,000
Hexadecimal 0x2710
Hexadecimal 0x00061A80 Low threshold of alarm 1 is 400,000 (decimal)
Hexadecimal 0x2710
Result
Periodic mode with a period of 360x10s = 3
600 seconds = 1hour
The supply time of the external load (slave)
before the Modbus request is 200 x100ms=
20 000ms ie 20s
• Slave address = 0x0A
• First register address = 0x1068
• Data type : 32-bit unsigned integer (bits
4 to 6 = 2)
• Modbus register type: input registers (bit
2 = 1)
• Active thresholds: low and high (bits 0 to
1 = 3)
(decimal)
Hysteresis of high threshold of alarm 1 is
10,000 (decimal)
Hysteresis of low threshold of alarm 1 is
10,000 (decimal)
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