189
Cycle Time
Section 8-3
8-2-2
Startup Operation after a Power Interruption
The Customizable Counter Unit will start operating in any one of the following
cases depending on the status of the RUN/STOP Command Bit (word n bit
00) and the RUN/STOP Command Enable/Disable and Operating Mode at
Startup (word m bits 00 to 07):
• The RUN/STOP Command Enable/Disable and Operating Mode at Star-
tup is 00 Hex and the RUN/STOP Command Bit (word n bit 00) is ON
(RUN mode).
• The RUN/STOP Command Enable/Disable and Operating Mode at Star-
tup is 04 Hex (RUN mode) or 03 Hex (MONITOR mode).
• The RUN/STOP Command Enable/Disable and Operating Mode at Star-
tup is 01 Hex (Programming Console mode), the Programming Console is
connected, and its mode selector is set to RUN or MONITOR mode.
8-3
Cycle Time
This section describes calculating the cycle time and I/O response time for the
Customizable Counter Unit.
8-3-1
Overview
The processes involved in a single execution cycle are shown in the following
table, and their respective processing times are explained. The total time
required for this processing is called the cycle time.
Note
1.
Set in Unit Setup Area word DM 6619.
2.
The time can be set in Unit Setup Area word DM 6617. The default is
0.2 ms fixed and the setting range is 0.1 to 50.0 ms variable.
3.
The communications processing time for devices connected to the periph-
eral port will be essentially 0 if the Peripheral Connection Switch is turned
OFF.
Process
Content
Time requirements
Overseeing
Refreshing bits in SR and AR Areas and
check for errors.
16
m
s
Program execution
User program is executed.
Total time for executing instructions. (Varies
according to content of user’s program.)
Cycle time calculation
Standby until set time, when minimum cycle
time is set. (See note 1.)
Calculation of cycle time.
Preset cycle time monitoring time.
33
m
s, excluding standby processing.
I/O refresh in Customiz-
able Counter Unit
Contact input information is read to input bits.
Output information (results of executing pro-
gram) is written to contact outputs.
Special I/O refreshed (pulse I/O for HCP22-
V1 and pulse inputs/analog outputs for
HCA22-V1).
Memory shared between CPU Unit and Cus-
tomizable Counter Unit refreshed.
CS1W-HIO01-V1: 25
m
s
CS1W-HCP22-V1/HCA22-V1:
45
m
s (When data is exchanged with CPU
Unit using only the words allocated in the SR
Area. DA output is disabled with CS1W-
HCA22-V1.)
CS1W-HCA22-V1: 105
m
s
CS1W-HCA22-V1: 30
m
s per DA output 1CH
CS1W-HCA12-V1: 150
m
s (END refresh)
Peripheral servicing
Devices connected to peripheral port
serviced. (See note 3.)
Events between CPU Unit and Customizable
Counter Unit services.
Flash memory written.
Peripheral Connection Switch OFF: 3
m
s
Peripheral Connection Switch ON but not
monitoring: 35
m
s
Peripheral Connection Switch ON and moni-
toring: 0.2 ms (See note 2.)
Содержание CS1W-HCA12-V1
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