Parameters accessible with Function Code 03, 06,10h
Scheduler
68 HC900 Process Controller Communications User Guide Revision 13
April 2017
Procedure for Uploading Setpoint Schedules
Table 6-14 Steps to Upload a Setpoint Schedule using Modbus Function Codes 3, 6, 16
Set the scheduler to RESET by writing any number to Reset (p. 70). This can be done either
with function code 6 or 16.
Load the schedule into the setpoint scheduler block by writing the schedule number to
Current Program Number (p. 69). This is a floating point register and requires a multiple
register write (function code 16)
Read the header information desired. Guaranteed Soak Limits 1-8 (p. 69), Jog Segment (p.
69), Time Units (p. 70). Use function code 3.
Read the information for each segment in the schedule (p. 71) using function code 3.
Scheduler parameters
This table contains Values of Schedulers. Fixed addresses are for Scheduler #1; see Table 6-1 for fixed
addresses of other Schedulers.
Parameters commonly used for controlling a scheduler are marked with a single asterisk*.
Parameters commonly used to define a schedule are marked with two asterisks **.
The addresses given in Table 6-15 do not necessarily apply to schedulers in the custom map. For custom
addresses view or print a report in HC Designer.
Table 6-15 Scheduler Parameters
Floating Point in Engineering Units.
Floating Point in Engineering Units.
Floating Point in Engineering Units.
Floating Point in Engineering Units.
Floating Point in Engineering Units.
Floating Point in Engineering Units.
Floating Point in Engineering Units.
Floating Point in Engineering Units.
Scheduler Auxiliary Output 1**
Floating Point in Engineering Units.
Scheduler Auxiliary Output 2**
Floating Point in Engineering Units.
Scheduler Auxiliary Output 3**
Floating Point in Engineering Units.
Scheduler Auxiliary Output 4**
Floating Point in Engineering Units.
Scheduler Auxiliary Output 5**
Floating Point in Engineering Units.
Scheduler Auxiliary Output 6**
Floating Point in Engineering Units.
Scheduler Auxiliary Output 7**
Floating Point in Engineering Units.
Scheduler Auxiliary Output 8**
Floating Point in Engineering Units.