Mitsubishi Electric MELSEC iQ-R Series Programming Manual page 173

■Output ON time conversion/output conversion
This function block outputs a duty manipulated value (MVB) to a manipulated value (MV).
Item
Duty manipulated value (MVB) ON time
Duty manipulated value (MVB) OFF time
CTDUTY: Control output cycle, T: Execution cycle, MV: Manipulated value (%)
Ex.
Execution cycle: T = 100ms, Control output cycle: CTDUTY = 1.0s, Manipulated value: MV = 30%
MV read
Execution
cycle (ΔT)
100ms
Control
output cycle
(CTDUTY)
ON
manipulated
variable (MV) 30%
ON: 300ms
■Disable alarm detection
This function block sets whether to detect alarms (ALM) or not in the variation rate & high/low limiter processing.
Item
Disable alarm detection by setting tag data
Disable alarm detection by control mode selection
Disable alarm detection by loop stop processing
■Hold processing
This function block sets whether to hold M+P_DUTY outputs or not when a sensor error (SEA) has occurred in M+P_IN, a tag
access FB.
The hold processing is set in the process control extended setting in the engineering tool.
[Options]  [Convert]  [Process Control Extension Setting]  [I/O Control]  [Holding Processing]
• "Yes" is selected for "Hold the output of M+P_OUT1, M+P_OUT2, M+P_DUTY"; Outputs are held.
• "No" is selected for "Hold the output of M+P_OUT1, M+P_OUT2, M+P_DUTY"; The operation continues.
■Loop stop processing
When the stop alarm (SPA) of the alarm (ALM) is TRUE, this function block performs the following processing.
• Outputs (MVB) are held.
• The control mode is automatically switched to MANUAL.
• When DMLA, MHA, or MLA of the alarm (ALM) has occurred, the DMLA, MHA, or MLA is reset.
• No alarm is detected in the variation rate & high/low limiter processing.
Description
Duty manipulated value (MVB) ON time = ON time execution cycle count  T
The ON time execution cycle count is defined as the following value with the first digit after the decimal point
rounded off.
CTDUTY×MV
ΔT×100
Duty manipulated value (MVB) OFF time = OFF time execution cycle count  T
The OFF time execution cycle count is defined as (number of executions in a control output cycle) - (execution
cycle count of ON time).
1s
OFF: 700ms
Disable alarm detection processing
If the following bits in the disable alarm detection (INH) are TRUE, no DMLA,
MHA, or MLA of the alarm (ALM) will be detected.
• ERRI
• DMLI
• MHI
• MLI
In MAN or CMV mode, DMLA, MHA, and MLA of the alarm (ALM) are reset
and DMLA, MHA, or MLA will not be detected.
Page 171 Loop stop processing
MV read
1s
ON
ON: 300ms OFF: 700ms
9.6 Time Proportioning Output (M+P_DUTY)
9
9 I/O CONTROL
171