CJ2M-MD211/MD212 Function Block For Deceleration Stop(REAL)

Deceleration Stop (REAL)
Name Deceleration Stop(REAL): MD_CPU061_Stop_REAL
Basic Function Decelerates an operating axis to a stop.
Originates from Tsunagi Lab Europe
Created by OEE-HQ HvB (creation and testing)
File Name MD_CPU061_Stop_REAL.cxf
Applicable models CPU Unit CJ2M-CPU Unit version 2.0 or higher with max. two
CJ2M-MD211 (NPN) or
CJ2M-MD212 (PNP)
CX-Programmer Version 9.1.2 or higher
Conditions for usage None.
Function Description Starts deceleration stop for the axis specified with Axis No. (Axis) when Start (Execute) is turned ON (using the selected Pulse output method).
The Deceleration stop completed (Done) will be turned ON when a deceleration stop by this FB is completed.
It will not be turned ON when a deceleration stop is interrupted by a Multistart by another instance or error.
The Error flag (Error) and Error code (ErrorID) will be output when an error related to this FB occurs.
They will be turned OFF when Start (Execute) is turned OFF. If Start (Execute) was turned OFF before deceleration stop is completed, they will be turned ON at least for one cycle when a corresponding condition occurs.

Kind of FB definition Connect Always ON type
  Connect the EN input to the Always ON Flag (P_ON).
  The same instance cannot be used in two or more places.
FB Precautions • When using the Pulse output 0&1 and 2&3 simultaneously, use the same Pulse output method for them.
• When this FB starts with low Pulse output frequency as there is no Pulse output during one cycle, it is stopped without deceleration. In this case, it becomes the same as the condition that the Pulse output is stopped by the INI instruction (Fun No.880).

If Start (Execute) is turned ON with no origin defined, the present value of output pulse counts will be cleared to 0 and output pulses for deceleration will be counted (If this FB starts with low Pulse output frequency as there
is no Pulse output during one cycle, output pulse counts will not be cleared to 0).

The MD_CPU0*_* function blocks are offered 'as is' and may serve as a basis for development. Users should previously test its adequacy to the final application.

Omron can not be held responsible in case of malfunction.

EN input condition  • Connect the EN input to the Always ON Flag (P_ON).
 • If a different type of bit is connected to EN, the FB outputs will be maintained when the connected bit is turned OFF.
Restrictions other • This FB does not have the function to prohibit axis operations.
• If another Move command is executed during execution of this FB, the command executed later will be given priority.
Application example Turning the start trigger from OFF to ON will start operating the Servomotor connected to the Pulse output 0 on the CJ2M-MD21* Unit to perform origin search. After the origin search is completed, Present Position Change will be executed.

After the origin search is completed, Present Position Change will be executed.

Related manuals  CJ2M Pulse I/O User Manual (W486)
 CJ2 Hardware User Manual (W472)
  • Variable Table 

Input Variables

Name Variable name Data type Default Range Description
EN EN BOOL     1 (ON): Starts FB
0 (OFF): Does not start FB
Axis No. Axis INT &0 &0 to &3 &0: Pulse output 0, &1: Pulse output 1
&2: Pulse output 2, &3: Pulse output 3
Start Execute BOOL 0(OFF)   OFF -> ON (rising edge) starts deceleration stop
Deceleration rate Deceleration REAL +1.0 +1.0 to +65535.0 Specifies the deceleration rate.
Unit: Hz/4ms (Decrease (Hz) in frequency per Pulse control period (4ms))
e output method OutPulseSelect INT &0 &0 to &1 &0: CW/CCW output
&1: Pulse + direction output

Output Variables

Name Variable name Data type Range Description
ENO ENO BOOL   1 (ON): FB operating normally
0 (OFF): FB not started, or FB ended with error
Deceleration stop completed Done BOOL   1 (ON) indicates that a deceleration stop has been completed.
Error flag Error BOOL   1 (ON) indicates that an error has occurred in the FB.
Error code (May be omitted) ErrorID WORD   The error code of the error occurred in the FB will be output. For details of the errors, refer to the sections of the manual listed in the Related manuals above. When Unit No. or Axis. No. is out of the range, #0000 will be output.

Revision History

Version Date Contents
1.00 16-Feb-2012 Based on Function Block: _NCCPU061_Stop_REAL


This manual is a reference that explains the function block functions. It does not explain the operational limitations of Units, components, or combinations of Units and components. Always read and understand the Operation Manuals for the system’s Units and other components before using them.