Measurement Transmission; Continuous Transmission; Eeprom Error Management - Scaime eNod4-F ETHERNET Software User Manual

4.7 Measurement transmission

Measurement transmission can be triggered by a master request but it might also be triggered and used through the
following options:
•
transmission triggered by a rising or falling edge on a logical input
•
transmission at a configurable period (defined in ms) while a logical input is maintained at a given logical
level
•
continuous transmission at a configurable period (defined in ms) after a master request. The transmission
is then stopped by another master instruction, be careful not to use this mode in half-duplex at a too high
rate.

4.8 Continuous transmission

SCMBus and fast SCMBus communication protocols allow eNod4 to transmit measurements at a user-defined rate
without the need for successive master queries. To perform this measurement acquisition mode, it is necessary to set
first the 'sampling period' (in ms):
Address SCMBus
0x003F
A value of 0 implies that measurement transmission is synchronized on the A/N conversion rate. The continuous
transmission is triggered and stopped by reception of the following commands:
SCMBus/fast SCMBus functional command
start net measurement transmission
start factory calibrated points transmission
start brut measurement transmission
Note 1: the measurement transmission rate also depends on the baud rate. So, to achieve the fastest transmission, it
is necessary to use the highest baud rate.
Note 2: as RS485 is a half-duplex communication medium, it can be a little hard to transmit the 'stop continuous
transmission' query if the bandwidth is saturated. Therefore, prefer USB communication channel to reach the highest
measurement transmission rate.

4.9 EEPROM error management

EEPROM management identical to Modbus RTU (See § Modbus RTU)
Description
SCMBus Measurement
transmission period
stop continuous transmission
User manual SCAIME:
NU-Soft-eNod4F-ETH-E-0716_235709-C.doc
Accès
RW
16/113
Type
Uint
Command code
E0
H
E1
H
E2
H
E3
H