I/O Expansion Module Overview
14
HMC3000 Series I/O Module Guide
14
Specific High-speed Counter Registers
The registers and I/O associated with the High-Speed Counter can be found below.
Function
Counter 1
(Channel 0)
Counter 2
(Channel 1)
Trigger Bit
X
nn
000
X
nn
002
Enable Bit
M
nn
080
M
nn
176
Reset Bit
M
nn
081
M
nn
177
Configuration Register
MW
nn
00
MW
nn
06
Current Count Register (LSW, MSW)
MW
nn
01, MW
nn
02
MW
nn
07, MW
nn
08
Preset Register (LSW, MSW)
MW
nn
03, MW
nn
04
MWn
n
09, MW
nn10
Note: nn is the slot in which the module is installed (slot 1 is 01, slot 2 02, etc.)
For example, a module installed in Slot 3 has the following assignments:
Function
Counter 1
(Channel 0)
Counter 2
(Channel 1)
Trigger Bit
X03000
X03002
Enable Bit
M03080
M03176
Reset Bit
M03081
M03177
Configuration Register
MW0300
MW0306
Current Count Register (LSW, MSW)
MW0301, MW0302
MW0307, MW0308
Preset Register (LSW, MSW)
MW0303, MW0304
MW0309, MW0310
Configuring Pulse Width Modulation (PWM) Outputs
Maple Systems’ HMC3000 I/O modules ha
ve built-in Pulse Width Modulation functionality. Specific registers and
bits are predefined for setup and control of these functions. No logic is required to run the PWM, other than
logic that may be used to configure and control them.
There are four modes of PWM: Normal, CW/CCW, Pulse/Direction and Fixed Pulse. Use the information below
to configure the desired PWM output mode.
Note: For each table below, nn is the slot in which the module is installed (slot 1 is 01, slot 2 02, etc.)
Normal PWM
The frequency must be the same for channel 1 and channel 2, but the Duty Cycle is independently adjustable for
each channel. Duty Cycle can be adjusted while the output is running. The valid range is 0 to 100%, but the
effective range will vary depending on the device being controlled. The frequency can be adjusted while running
(place a 2 in the Config register). The Channel 1 and Channel 2 outputs can be enabled and disabled
independently.
Summary of Contents for HMC3-M0808P0401T
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Page 67: ...HMC3 M1614Y 67 HMC3000 Series I O Module Guide 67 HSC Single Phase Down Counter HSC Quadrature...
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