I/O Smart Link Device Functions

Acti 9 Device Command and Control Functions

The products concerned are:

iOF+SD24
OF+SD24
iACT24
iATL24
Reflex iC60
RCA iC60

Input state acquisition function:

Open/closed state (input I1 of the Ti24 interface)
Trip signal (input I2 of the Ti24 interface) for the protection devices

Open and close order function:

Each I/O Smart Link channel offers an output (Q):

Output Q is set to 1 by forcing the bit of the channel concerned to 1 in the activation register (ON). The Modbus command register bit is automatically set to 0 by I/O Smart Link as soon as the order has been sent to output Q.
Output Q is set to 0 by forcing the bit of the channel concerned to 1 in the deactivation register (OFF). The Modbus command register bit is automatically set to 0 by I/O Smart Link as soon as the order has been sent to output Q.

Installation life management function:

I/O Smart Link stores the number of changes of state (or number of operations) for the control and protection devices, which allows the wear on these devices to be estimated. To do this, I/O Smart Link counts the changes of state of input I1 (on falling edge) for each channel.
I/O Smart Link stores the number of protection device trips, thus highlighting detected faults in the electrical installation. To do this, I/O Smart Link counts the changes of state of input I2 (on falling edge) for each channel.
I/O Smart Link stores the total time when control products are closed, which allows the wear on controlled loads to be estimated. To do this, I/O Smart Link counts the changes of state of input I1 (OF status) for each channel.
This data (number of changes of state, running hours) can be reset to 0, and the initialization date can be stored.

Command and Control Functions of Devices Not in the Acti 9 Range

Input state acquisition function:

All other types of device offering low level I/O (24 Vdc) can be connected to the 22 inputs and 11 outputs offered by I/O Smart Link. Each I/O Smart Link channel offers two inputs (I1 and I2).

Command function:

Each I/O Smart Link channel offers an output (Q).

Output Q is set to 1 by forcing the bit of the channel concerned to 1 in the activation register (ON). The Modbus command register bit is automatically set to 0 by I/O Smart Link as soon as the order has been sent to output Q.
Output Q is set to 0 by forcing the bit of the channel concerned to 1 in the deactivation register (OFF). The Modbus command register bit is automatically set to 0 by I/O Smart Link as soon as the order has been sent to output Q.

Counting Functions

Schneider Electric energy meters with pulse output:

iEM2000T (the pulse weight equals 10)
iEM3110 (the pulse weight can be configured)
iEM3155 (the pulse weight can be configured)
iEM3210 (the pulse weight can be configured)
iEM3255 (the pulse weight can be configured)

I/O Smart Link calculates the energy consumption and the average power between two pulses.

Energy consumption = Number of pulses counted × pulse weight

Average power between two pulses = (3600 × Pulse weight)/t; the result is expressed for one hour.

With t, the time in seconds between the last two pulses received.

Other types of meter with pulse output:

Water, gas meters, for example.
Any type of meter whose pulse output complies with standard IEC 62053-21 (minimum pulse 30 ms).

The pulse weight can be configured.

I/O Smart Link calculates the consumption and the average flow between two pulses.

Consumption = Number of pulses counted × pulse weight

Average flow = (3600 × pulse weight)/t; the result is expressed for one hour.

With t, the time in seconds between the last two pulses received.

The average power data (or average flow) between two pulses is reset to 0:

After a duration d = 3 x t; if 3 x t is less than 5 seconds, the duration d equals five seconds

With t, the time in seconds between the last two pulses received.
After 24 hours without a pulse
After loss of the 24 Vdc input/output voltage

Every 10 minutes, the meter values are saved in the EEPROM memory.

Each time it changes, the value of each pulse is saved instantly in the EEPROM memory.

The meter parameter setting dates are saved instantly in the EEPROM memory.

System Behavior in the Event of Loss of the 24 Vdc Power Supply

Up to a duration of 10 ms, I/O Smart Link is unaffected by voltage dips. If the voltage is below 19.2 Vdc (24 Vdc - 20%) for more than 10 ms, I/O Smart Link changes to degraded mode:

All the outputs are set to zero. However the Acti 9 control auxiliaries (iACT24, iATL24, Reflex iC60, RCA iC60) distinguish this loss of voltage event in actual order. They do not therefore change state.
The time between two write operations in the EEPROM memory is 10 minutes. Data previously written to this memory is not modified on loss of voltage. Saved values therefore date back a maximum of 10 minutes.
Calculated power (or flow) values are not saved. They are set to zero.

System Behavior at the Time the 24 Vdc Power Supply is Energized or Returns

NOTE: The I/O Smart Link power supply must be between 19.2 Vdc (24 Vdc - 20%) and 28.8 Vdc (24 Vdc + 20%).

The outputs remain at zero.
The Acti 9 control auxiliaries (iACT24, iATL24, Reflex iC60, RCA iC60) do not change status since they operate according to rising or falling edge.
Data stored in the EEPROM memory is written to the corresponding registers (pulse weights, event counters, impulse counters, running hours counters, counter reset dates). The values in the registers are therefore those of the last save to the EEPROM memory. These values may differ from the last values read in the registers before the power failure.

NOTE: If the I/O Smart Link coding switches are set to zero during the loss of voltage, I/O Smart Link is reset when the power returns. For more information, see Setting the Modbus Address Parameters.