Specifications

Command Set 4-13
Pulse Transition (PT)
The Pulse Transition command is used on Frequency and Timer input
modules. It is used to set the direction of the edge used to trigger the
measurement cycle. There are four possible edge transitions: (+ to -), (- to
+), (- to -), (+ to +). For example:
Command: $1PT+ -
Response: *
Command: #1PT
Response: *1PT+ -50
Read Data (RD)
The read data command is the basic command used to read the buffered
sensor data. The output buffer (Figure 2.1) allows the data to be read
immediately without waiting for an input A/D conversion. For example:
Command: $1RD
Response: *+00072.00
Command: #1RD
Response: *1RD+00072.10A4
Since the RD command is the most frequently used command in normal
operation, a special shortened version of the command is available. If a
module is addressed without a two-letter command, the module interprets
the string as an RD command.
Command: $1
Response: *+00072.10
Command: #1
Response: *1RD+00072.10A4
Read Events (RE)
The Read Events command reads the number of events that have been
accumulated in the Events Counter. The output is a seven-digit decimal
number. For example:
Command: $1RE
Response: *0000107
Command: #1RE
Response: *1RE00001074A
The maximum accumulated count is 9999999. When this count is reached,
the Events Counter stops counting. The counter may be cleared at any time
with the Clear Events (CE) command.
The Event Counter count is stored in volatile memory. If power is removed,
the Event Counter will reset to all 0’s upon power up.