Control Modules - Carrier 19EF Series Start Up & Operation Manual

Control Modules

Turn controller power off before servicing controls. This
ensures safety and prevents damage to controller.
The Processor module (PSIO), 8-input (Options) mod-
ules, Starter Management Module (SMM), and the Local In-
terface Device (LID) module perform continuous diagnostic
evaluations of the hardware to determine its condition. Proper
operation of all modules is indicated by LEDs (light-
emitting diodes) located on the side of the LID, and on the
top horizontal surface of the PSIO, SMM, and 8-input
modules.
RED LED — If the LED is blinking continuously at a
2-second rate, it is indicating proper operation. If it is lit con-
tinuously or if the LED blinks at a rate of 3 times per sec-
ond, it indicates a problem requiring replacement of the module.
Off continuously indicates that the power should be checked.
If the red LED blinks 3 times, a software error has been dis-
covered and the module must be replaced. If there is no in-
put power, check fuses and the circuit breaker. If fuse is good,
check for shorted secondary of transformer, or if power is
present to the module, replace the module.
GREEN LEDs — There are one or 2 green LEDs on each
type of module. These LEDs indicate communication status
between different parts of the controller and the network mod-
ules as follows:
LID Module
Upper LED — Communication with CCN network, if present;
blinks when communication occurs.
Lower LED — Communication with PSIO module; must blink
every 3 to 5 seconds.
PSIO Module
Green LED closest to communications connection — Com-
munication with SMM and 8-input module; must blink
continuously.
Other Green LED — Communication with LID; must blink
every 3 to 5 seconds.
8-Input Modules and SMM
Green LED — Communication with PSIO module; will blink
continuously.
Notes on Module Operation (see Fig. 30-34).
1. The machine operator monitors and modifies configura-
tions in the microprocessor through the 4 softkeys and
the LID. Communication with the LID and the PSIO is
accomplished through the CCN (Level II) bus. The com-
munication between the PSIO, SMM, and both 8-input
modules is accomplished through the sensor bus, which
is a 3-wire cable. This sensor bus runs in parallel be-
tween modules.
On sensor bus terminal strips, Terminal 1 of PSIO mod-
ule is connected to Terminal 1 of each of the other mod-
ules. Terminals 2 and 3 are connected in the same man-
ner. If a Terminal 2 wire is connected to Terminal 1, the
system does not work.
2. If a green LED is solid on, check communication wiring.
If a green LED is off, check the red LED. If the red LED
is normal, check the module address switches (Fig. 30-
34). Proper addresses are:
MODULE
SMM (Starter Management Module)
8-input Options Module 1
8-input Options Module 2
3. Power is supplied to modules within the control panel via
ADDRESS
SW1 SW2
3 2
6 4
7 2
63
If all modules indicate communications failure, check com-
munications plug on the PSIO module for proper seating.
Also check the wiring terminations (Level II — 1:red,
2:wht, 3:blk; Sensor bus — 1:red, 2:blk, 3:clr/wht) and
the plug is connected to the proper socket. If a good con-
nection is assured and the condition persists, perform an
Attach to Network Device upload of the PSIO module.
The correct address of the PSIO module must be known
in order to perform this function. If the Attach to Net-
work Device function does not work, replace the module.
If only one 8-input module or SMM indicates commu-
nication failure, check the communications plug on that
module. Make sure the wiring is correct, and the plug is
connected to the correct socket. If a good connection is
assured and the condition persists, replace the module.
All system operating intelligence rests in the PSIO mod-
ule. Some safety shutdown logic resides in the SMM in
case communications are lost between the 2 modules. The
PSIO monitors conditions using input ports on the PSIO,
the SMM, and the 8-input modules. Outputs are con-
trolled by the PSIO and SMM as well.
21-vac power sources.
The transformers are located within the power panel, with
the exception of the SMM, which operates from a
24-vac power source and has its own 24-vac transformer
located within the starter.
Within the power panel, T1 supplies power to the LID,
the PSIO, and the 5-vac power supply for the transduc-
ers. The other 21-vac transformer is T4, which supplies
power to both 8-input modules (if present). T4 is capable
of supplying power to two modules; if additional mod-
ules are added, another power supply will be required.
Power is connected to Terminals 1 and 2 of the power
input connection on each module.
Fig. 30 — Address Selector Switch and
LED Locations