Chapter 4 Command Set 4-175
Chapter 4
4080, 4080D
#AAN
Name: Read Counter or Frequency Value
Description: Instructs the addressed counter/frequency module at address
AA to read the counter or frequency value of counter 0 or
counter 1 and return the acquired data.
Syntax: #AAN(cr)
# is a delimiter character.
AA (range 00-FF) represents the 2-character hexadecimal
address of counter/frequency module that you want to interro-
gate.
N represents the counter number.
N=0 represents counter 0
N=1 represents counter 1
(cr) is the terminating character, carriage return (0Dh)
Response: >data(cr) if the command is valid.
?AA(cr) if an invalid operation was entered.
There is no response if the module detects a syntax error or
communication error or if the specified address does not exists.
? is a delimiter character indicating the command was invalid.
AA (range 00-FF) represents the 2-character hexadecimal
address of a counter/frequency input module.
(data) is the value that is retrieved by the module by reading
counter 0 or counter 1. The data format consists of eight
hexadecimal digits.
(cr) is the terminating character, carriage return (0Dh).
Example: command: #120(cr)
response: >000002FE(cr)
The command requests the counter/frequency module at
address 12 to read the counter 0 and return the data. The
counter/frequency module at address 12 responds that the
value of counter 0 is 000002FE (hexadecimal) which equals 766
(decimal).
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