CHAPTER 5.0 Functional Overview
5-27
CDS7324 (FORMERLY LSF-0819)
Rev. A
INSTALLATION & USER’S MANUAL
5.10.1.1
Digital Input Function Assignment
Setting the digital input configuration entry for the digital input, to the appropriate handler function number,
configures the functionality of each input. The table below lists the functions that can be assigned. Only the
NULL function can be assigned to more than one digital input. If an attempt is made to map a function twice a
mapping error is indicated.
For Edge Triggering:
The handler function is not called repetitively, but rather the handler function is called when: -
•
Initially setting up the digital input, when no previous function assigned to the input (i.e first time).
•
A transition occurs in the digital input.
•
Change the setting of the digital input invert.
•
On Power-Up (if configuration has been saved to NVM).
For Level Triggering:
The handler function is called repetitively and also when: -
•
Initially setting up the digital input, when no previous function assigned to the input (i.e first time).
•
The setting of the digital input invert is changed.
•
On Power-Up (if configuration has been saved to NVM).
NOTE :- If digital inputs are already configured, and re-configure the input for a different purpose, do not switch
any of the digital inputs, and do not invert any of the digital inputs. The handler function is not called
Handler
Handler Function
Input Set
Input Cleared
0 NULL
-
-
3
Brake Release Switch
Release Brake
Enable Brake
6
Positive Limit Switch
Inactive
Active
7
Negative Limit Switch
Inactive
Active
8
Homing Switch
Active
Inactive
9 Quickstop
Quickstop -
10
Automatic Manual Mode
Auto. Mode
Manual Mode
11 Controlled
Disable
Disable
-
17 CAN
Enable/Disable
Disable
Enable
18 CAN
Re-enable
Enable
-
19 Re-boot
Re-boot
-
Table 5.18 List of Digital Input Handler Functions
5.10.1.1.1
Brake Release Switch
This handler function releases the brake. The default operation is that setting the digital input (current flowing), will
release the brake, and clearing the input will enable the brake. By configuring this digital input, the user takes
control of the motor brake. There are two additional parameters that allow configuration of the amount of control
the user has over the brake.
brake_control
(1603) configures the brake control in normal operation
brake_fault_control
(1505) configures the brake control in a fault condition
The default operation is that input not configured by user. Brake is under Drive control so that on enable the brake
is released immediately. On disable or in a fault condition, the brake is applied immediately. (e.g. default is
brake_control
= 1 and
brake_fault_control
= 1)
For full user control of the brake in all conditions including fault conditions and during a Quick Stop set both
brake_control
and
brake_fault_control
to 0 in addition to configuring the digital input function .
