Next Advance SP1800 - Manual (Page 51)

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SP1600/1800 Programmable Syringe Pump
Publication #1200-02 46 9/15/04
Pump Motor Operating (Pin 7): This output provides an external signal indicating when the pump
motor is operating. This pin is configured with the
n
setup command, or the "ROM" remote
command. When set to 0, the output is only at logic high when the motor is operating (pumping). When
set to 1, the output is logic high when the motor is operating or when the Pumping program is executing a
pause timer. Otherwise, the output is a logic low.
Pumping Direction Controls (Input: Pin 3; Output: Pin 8): Allows bi-directional control of the
pumping direction. The input pin, when activated, emulates the pumping direction key, changing the
pumping direction. This function, therefore, is only applicable where the pumping direction key would be
applicable. The function of the input pin is configured with the
aa
setup command, or the "DIN"
remote command.
When the mode is set to reciprocating pumps ("RE" setup command or "0" remote), then if the current
pumping direction is withdraw, a falling edge sets the direction to infuse. If the current pumping direction
is infuse, a rising edge sets the direction to withdraw. Otherwise, this input pin has no affect.
When the mode is set to dual pumps ("dU" setup command or "1" remote), then if the current pumping
direction is withdraw, a rising edge sets the direction to infuse. If the current pumping direction is infuse,
a falling edge sets the direction to withdraw. Otherwise, this input pin has no affect.
Dual and reciprocating pumping systems are created using 2 pumps attached with the accessory cable
CBL-TTL-1.
The output pin provides an output signal to external devices indicating the direction of pumping. A logic
low indicates withdraw, and a logic high indicates infuse. For example, this pin can be used to control an
external valve, allowing the syringe to refill from a reservoir.
10.2 TTL I/O Control from the Pumping Program
Various Pumping Program functions can define how the pump reacts to levels on the TTL I/O connector
or set output levels. These are summarized in the following table:
Pumping
Program
Function TTL I/O Control Pin Pin # Action
OUT.n Program Output 5 Set logic level output to ‘n’
EV:nn Event Trigger 4 Falling edge triggers a jump to Phase ‘nn’
ES:nn Event Square wave
Trigger 4 Rising or falling edge triggers a jump to Phase 'nn'
IF:nn Program Input 6 Low level causes a jump to Phase ‘nn’
PS:00 Operational Trigger 2 Trigger activation resumes Program operation
10.3 TTL I/O Control From RS-232
The logic levels of pins 2, 3, 4, and 6 can be queried from an attached computer using the RS-232 ‘IN’
command.
The output logic level of pin 5 can be set with the RS-232 ‘OUT’ command.