Motorola MVME167 Bedienungsanleitung PDF herunterladen (Seite 19)

Synchro Bus Interface Card

ICD 13—Standard Controller ICD-13/05 19 of 56

In the above, XXXX can be any value, and the BCD digits HH and MMSS should be the

same as the time displayed at the moment the memory dump was done. There are no

more tests which can be performed without additional equipment or software, so

providing the memory dump matches and the time display increments correctly the

card should be assumed to be working satisfactorily.

8.0 Synchro Bus Interface Card

IOCs which require fast, deterministic communication with other IOCs using the Syn-

chro Bus will need a Reflective Memory card. At the Gemini telescopes all nodes will

be connected together in a single ring of fiber-optic cable[11]. For development pur-

poses where only a single node is available it is essential to connect the card’s fiber

transmitter to its receiver to obtain correct operation of the software.

8.1 Description

The Standard Controller Synchro Bus Interface cards is the VMIC

VMIVME-5588-000. It will be necessary to install a pair of bulkhead connectors on the

back panel of the VME crate and two short cables (1 meter should be sufficient, depend-

ing on the location

of the Reflective Memory card and the back panel connectors) from the card to these

connectors. Each card is supplied with a Product Manual [10] which describes the card

and its programming interface, card installation and set-up, VMIC’s warranty and repair

policy, and a complete parts list and circuit diagram.

A fiber cable assembly is needed to connect the reflective memory cards. The VMIC

VMICBL-000-F3-0xx fiber cable assembly can be obtained from VMIC at the same

time as buying the cards, using the above part number. The xx in the number should be

replaced by a length code obtained from the table below. These cables are U.L./NEC

rated OFNP and comprise a multi-mode single fiber with a 62.5 micron core and a 2.5

mm ST style bayonet connector on each end. The transmitters operate at 860 nm at 1

Gbaud, and the maximum attenuation between Reflective Memory nodes is 6 dB. Any

alternative cables should be equivalent to the above specification.

8.2 Installation

The reflective memory card is configured using a series of jumpers on both the mother

and daughter boards which make up the module. Jumper locations are shown in the dia-

gram on page 5-2 of the Product Manual, and should be set according to Table 13 on

page 20.

The Node ID jumpers E8 must be set uniquely for every Reflective Memory card on the

fiber ring. For development purposes where only a single node is available the setting

does not matter, but for the delivered hardware the Node ID will be specified by the

Gemini Software and Controls Group.

The VMIVME-5588 is a double-width module which only makes connections to one of

its VMEbus slots, thus when installing it the backplane daisy-chain jumpers must be

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Motorola MVME167 Bedienungsanleitung Seite 19