Coordination  Modes+   (MM->2->1)

<-       Coordination Modes+                  
   Force-Off+    FRC,YLD     Easy Float OFF
   Closed Loop   OFF     Auto Err Reset ON
   External      OFF        NTCIP Yield + 0   
   Latch Sec Frc OFF        -- Leave Walk --
   Stop-in-Walk  ON           Before TIMED
   Walk Recycle  NO_RECYCLE   After TIMED

Note that the "left" page of MM->2->1 is entitled Coordination Modes because all of the NTCIP objects are programmed on this page.  The "right" page (above) is entitled Coordination Modes+ because all  Naztec MIB's related to coordination modes are programmed under this menu.

The Closed Loop parameter should only be turned ON if the controller is operating as a secondary under closed loop operation (coordination set by a closed loop master). 

Stop-in-Walk is typically set ON to allow split times less than the pedestrian min times (walk + ped clearance + veh clearance).  This will allow an occasional pedestrian call to push the controller out of coordination; however, the controller can usually get back in step within a cycle if shortway transiion is allowed. 

The Walk Recycle and Leave Walk modes are needed if you want to rest-in-walk in the coordinated phase.  A ped recall will not reservice the walk until the vehicle phase is reserviced, unless one of the Walk Recycle modes is used.

 

 

 

 

 

 

 

 

 

 

 

 

NTCIP Object Reference - Coordination Modes+ (MM->2->1)

Force-Off+

Please refer to the Version 50 Software Manual for information on the following Other NTCIP modes:

  • FRC,YLD

  • EASY 

  • PERM_SINGL 

  • PERM_FRC 

  • PERM_FLT 

  • PERM_FRC_% 

  • PERM_FLT_% 

Easy Float

This setting only applies if Force-Off is programmed as OTHER and Force-Off+ is programmed as Easy.  This setting allows the Easy mode to support fixed or floating force-offs similar to the NTCIP modes FIXED and FLOAT.

Closed Loop

Closed loop operation allows a master or sub-master to control the operation of all secondary controllers in the sub-system that have this parameter turned ON.  Controllers may still be polled by a master for monitoring purposes if this parameter is turned OFF but will operate off the local (or secondary) time base schedule.

Auto Err Reset

A coordination error occurs if a phase is not serviced for at least two cycles.  If a coordination error occurs and Auto Err Reset is turned OFF, the error must be reset manually because the next time-of-day pattern change return the controller to coordination.  Therefore, most users leave this parameter turned ON to allow the controller to automatically reset a coordination error during the next pattern change. 

External

This allows the selection of the pattern from the external offset, cycle, and split lines from the inputs of the D-connector (hardwire interconnect).

  • OFF - Disables external coordination inputs and outputs.

  • ON - Enables external coordination inputs and outputs 

Latch Sec Frc

Applies to OTHER coord mode ( Frc,Yld method) that allows secondary as well as primary force-offs to be specified.

Stop-in-Walk

Stop-in-Walk allows the controller to get back in step quickly when the split times in a pattern are shorter than the ped minimums (walk + ped clearance + veh clearance).  The offset correction is much quicker if SHORT/LONG transition is used and the shortway transition is at least 12%.  The valid entries for this parameter are:

OFF - If the pedestrian walk and ped clearance times are too large to be serviced within the allotted split, the pedestrian call for that phase will not be serviced.

ON - the local cycle counter will stop at the point where a force-off is issued to a phase and the phase is still timing pedestrian clearance. The coordinator will release the cycle counter at the end of ped clearance and immediately begin a transition to get back in step.

Note:  Rest-in-Walk (MM->1->1->2) on a phase defeats this selection.  Therefore, Rest-in-Walk programmed for a phase requires that it's split time satisfy the sum of walk + ped clearance + vehicle clearance.  The coordination diagnostics will insure this check with any short-way transition used to reduce the split time.

Walk Recycle

Walk Recycle determines if and when the WALK interval is recycled on the coordinated phase. Recycle may only occur if a ring is resting in a coordinated phase that has Rest-in-Walk enabled. The selections are:

  • NO_RECYCLE - after servicing walk and ped clearance, the controller will continue to rest in the coordinated phase until the next cycle (Local counter = 0) before recycling the walk.

     

  • IMMEDIATE - allows walk to recycle if there are no serviceable calls when the coordinated phase(s) reach their yield point.

     

  • Ø1256_INH - allows the walk to recycle at that point in the cycle when all phases on the "right" side of the intersection are inhibited. This is usually used when the coordinated phase is phase 4 or 8.

  • Ø3478_INH - allows the walk to recycle at that point in the cycle when all phases in the left side of the controller are inhibited. This is usually used when the coordinated phase is phase 2 or 6.

  • NO_PED_INH - allow recycle when the pedestrian omits are lifted on the coordinated phase (i.e. the earliest point in the cycle when the coordinator will allow a walk interval to be serviced).
     

  • NEVER - This option prevents the walk from being recycled after the phase serviced by the walk has begun. A pedestrian call will not recycle the walk until the controller services a conflicting phase.
Coord Yield Coord Yield provides an adjustment to the yield point calculations performed under FIXED and FLOAT force-off methods (originally called NTCIP Yield).  This topic is covered in the controller manual on Advanced Coordination and provides an adjustment of the yield points as shown below.

Coord Yield Adjustment For Ring 1 With BegGRN Offset Reference and Dual-lead Left-turn Sequence

Coord Yield Adjustment For Ring 1 With BegGRN Offset Reference and Lagging Left-turn Sequence

Leave Walk

Leave Walk Before determines when a phase will leave walk if it is resting in walk but has not been recycled or after they have been recycled.  The selections are:

  • TIMED - Leave the walk interval when the cycle counter is equal to the primary phase force-off minus the pedestrian clearance time. This is the Ped Leave point in the coordinated cycle (see below). TIMED guarantees rest-in-walk as long as possible in the coordinated cycle before moving to ped clearance.

  • ON DEMAND - Leave walk when immediately when a call is placed on an opposing phase.  ON DEMAND defeats rest-in-walk when an opposing call is present.