Built-in Output - Relays, Sound signal, Virtual relays

The parameters of Built-in outputs for: Relays, Sound signal, Virtual relays are:

– Name - each output already has a name given by the device and the user cannot change it, for the description of the Name parameter see Fig. 7.84,

– Mode - this parameter allows the user to select the method of operation of the output, the Mode parameter has the following options (see Fig. 7.87 and Fig. 7.88):

• disabled - the built-in output is inactive,

• above level - the result is a high state when the input data (see the the Source parameter) is above the level (see the Level parameter block), otherwise the output is low state,

• below level - the result is a high state when the input data (see the Source parameter) is below the level (see the Level parameter block), otherwise the output is low state,

• inside range - the result is a high state when the input data (see the Source parameter) will be within the range (see the Level parameter block), otherwise the output is low state,

• outside range - the result is a high state when the input data (see the Source parameter) will be out of the range (see the Level parameter block), otherwise the output is low state,

• PWM - this option is visible only for the SSR relay output type, the PWM mode is discussed in Chapter 7.10.3. Built-in output - PWM (Pulse-width modulation) mode for SSR relay output,

– Source - this parameter contains a list of logical channels (up to 60), where the selected logical channel will be a data source for this built-in output (see Fig. 7.85).

– Alarm state – this parameter allows to choose a type of output reaction in case of the alarm state appearance; The Alarm state is when the value of a Logical channel in which the data source for a built-in output returns -Err- state or the state of the exceeding range: low -Lo- state and high -Hi- state; There are the following options in this parameter:

• no change - means that at the time of an alarm state there is no change in the output,

• immediate OFF - means that in times of an alarm state the device immediately switches the output to low state,

• immediate ON - means that in times of an alarm state the device immediately switches the output to high state,

• timed OFF - means that in times of an alarm state the device switches the output to low state after a time delay set in the Timing parameter block,

• timed ON - means that in times of an alarm state the device switches the output to low state after a time delay set in the Timing parameter block,

• for the PWM mode in the SSR relay module instead of the Alarm state parameter there is the Alarm level parameter which allows the user to enter a value at the output in times of an alarm state (for more information see Chapter 7.10.3. Built-in output - PWM (Pulse-width modulation) mode for SSR relay output),

– Levels block parameter - these parameters allow the user to set a range of changes of the output depending on the input signal, discussed below in this Chapter, – Timing parameter block - these parameters allow the user to set a delay time

change of the output state and minimum duration of the output state, discussed below in this Chapter,

For Built-in outputs: Relays, Sound signal and Virtual relays, the low state is value '0' and the high state is value '1'.

The manufacturer discourages forcing relays state changes more often than every second because of their inertia. If the user does it anyway, the relay might not react to signal changes.

Levels parameter block (see Fig. 7.87 , Fig. 7.88 and Fig. 7.89 )

These parameters depend on the Mode parameter. The parameters are:

– Level mode – has 2 options:

• value – means that the level will be defined as a constant value,

• channel – means that the level will be defined as a logical channel,

– Level – this parameter defines a constant signal level exceeding which will cause an output state change (for Level mode: value), or allows to choose a logical channel whose current value will be the threshold for output state changes (for Level mode: channel); occurs for Mode:

• above level – if Source value is higher than Level value, a high state appears on the output,

• below level – if Source value is lower than Level value, a low state appears on the output ,

– Lower level and Upper level - these parameters define the range at which output state changes occur (for Level mode: value), or they allow to choose a logical channel whose current value will be the range for output state changes (for Level mode: channel); occurs for Mode:

• inside range – if the input data is within the defined range, a high state appears at the output,

• outside range – if the input data is outside the defined range, a high state appears at the output,

– Hysteresis – by defining this parameter the user can move the level for changes in the output state (see Fig. 7.87 and Fig. 7.88),

– Alarm level – this parameter is only visible for the PWM mode, allows the user to enter the value of fill of the pulse in times of an alarm state (for more information see Chapter 7.10.3. Built-in output - PWM (Pulse-width modulation) mode for SSR

i

i

relay output),

Fig. 7.87. One threshold control of the relay outputs

Fig. 7.88. Two threshold control of the relay outputs

Fig. 7.89. Levels settings for Mode: above and below level (left) and inside range and outside range (right)

Timing parameter block (see Fig. 7.92) The parameters of this block include:

– ON delay - this parameter allows to set the time that must pass from the time of exceeds Level value until the output switches from low to high state (see Fig. 7.90), – OFF delay - this parameter allows the user to set the time that must pass from the

time of exceeds Level value until the output switches from high to low state (see Fig. 7.90),

– Minimum ON time - the minimum duration of a high state (if the output switches to zone A

zone B

measurement Level parameter

Hysteresis parameter Output

state

zone B zone A

zone B

Lower level Upper level parameter

Hysteresis parameter Output

state

high state the low state will occur after this time) - see Fig. 7.91,

– Minimum OFF time - the minimum duration of a low state (if the output switches to low state the high state will occur after this time) - see Fig. 7.91,

Fig. 7.90. Principle of relay output operation for sample timing settings:

On delay=1 sec., OFF delay=2 sec.

Zone B

∆t=1s ∆t=2s

1 2 3 4 5 6 7 8 9 10 11 12 13 14

Input value

Zone A

Zone B

Level

Time [s]

Output value

1 0

ON delay

Time [s]

Zone A

OFF delay

Fig. 7.91. Principle of relay output operation for sample timing settings:

Min. ON time=5 sec., Min. OFF time=4 sec.

Fig. 7.92. Timing settings for different modes

7.10.3. Built-in output - PWM ( Pulse-width modulation) mode for SSR relay output