Accessory 24E2A
HARDWARE SETUP
Switch Configuration
UMAC Address DIP Switch S1
S1, S1-3, S1-4 are used to address the Acc-24E2A as shown in the table below.
S1-1 S1-3 S1-4 Board No. IC No. I-Var. Range Base Address
ON ON ON 1 2 I7200 $078200
OFF ON ON 2 3 I7300 $078300
ON OFF ON 3 4 I7400 $079200
OFF OFF ON 4 5 I7500 $079300
ON ON OFF 5 6 I7600 $07A200
OFF ON OFF 6 7 I7700 $07A300
ON OFF OFF 7 8 I7800 $07B200
OFF OFF OFF 8 9 I7900 $07B300
S1-2, S1-5, and S1-6 are used to determine whether the Acc-24E2A is communicating to a Turbo 3U
PMAC or a MACRO Station CPU.
S1-2 S1-5 S1-6 Function
ON ON ON 3U Turbo PMAC Use
MACRO Station Address DIP Switch S1
S1-1, S1-2, S1-3, S1-4 are used to address the Acc-24E2A as shown in the table below.
S1-1 S1-2* S1-3 S1-4 Board No. IC No. Base Address
ON ON OFF OFF 1 2 $00C040
OFF OFF OFF OFF 2 3 $00C060
* Always set to OFF for legacy MACRO Stations (part number 602804-100 thru 602804-104)
S1-5 and S1-6 are used to determine whether the Acc-24E2 is communicating to a Turbo 3U PMAC or a
MACRO Station CPU.
S1-5
S1-6 Function
OFF OFF 3U MACRO Station use
Acc-24E2 Clock Settings
The Phase Clock and Servo Clock must be configured on each Acc-24E2A baseboard. Each system can
have only one source for the servo and phase clocks and jumpers must be set appropriately to avoid a
timing conflict or a watchdog condition.
Starting in UMAC Turbo firmware version 1.937, the firmware will set the clock settings for the Acc-
24E2 cards in the UBUS automatically. To enable this feature, set jumper E13 from 2 to 3 for all of the
Acc-24E2s plugged into the UMAC system. At re-initialization (either $$$*** command or power up
with E3 jumpered on UMAC), the firmware will know that all of the cards are in the auto configuration
setup and will assign the card with the lowest base address setting (usually $78200) the task of sourcing
the clocks by setting variable I19 to the appropriate register. The clocks will be set initially to the factory
default servo update cycle and phase clock cycle. For a better understanding of this feature, refer to
description of I19 in the Turbo Software Reference Manual.
For UMAC Turbo systems with firmware older than version 1.937, set one of the Acc-24E2s to transmit
(E13 set 2-3) the phase and servo clock (usually the card at the lowest base address setting) and set the
rest of the Acc-24E2s to receive (E13 set 1-2) the phase and servo clocks.
For MACRO systems, the clock select jumper should be set to receive servo and phase clocks because the
MACRO CPU always provides the clocks. For the Acc-24E2A, E13 should be set 1-2.
Hardware Setup 7
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